Attachment O -LNext Design Reference Case (DRC) - 18 -v1.0 2022.pdf
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This draft request for proposal (RFP) from NASA's Goddard Space Flight Center solicits responses from interested parties to provide the Landsat Next Instrument Suite (LandIS). Respondents are advised to monitor www.Sam.gov for the potential release of a solicitation, which may include contract options. NASA intends to publicize a list of respondents to facilitate teaming arrangements, but respondents can request to be excluded. The RFP seeks the LandIS in support of continuing the Landsat program's acquisition of moderate-resolution land imagery from space.
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Text version
LSDS-2389
Version 1.0
Department of the Interior U.S. Geological Survey
Landsat Next Design Reference Case – 18 Days (DRC-18) Definition
November 2022
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Landsat Next Design Reference Case – 18 Days (DRC-18) Definition
November 2022
Document Owner:
Jeffery Schieler Date LNext Chief Engineer
KBR
Approved By:
Brian Sauer Date LNext Project Manager U.S. Geological Survey
EROS
Sioux Falls, South Dakota
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Executive Summary
The Landsat Next (LNext) Design Reference Case – 18 Days (DRC-18) provides an overview of the LNext mission operational image acquisition scenarios over an 18 day period.
Landsat represents the world’s longest continuously acquired collection of space-based moderate-resolution land remote-sensing data. The program’s imagery provides a unique resource for those who work in agriculture, geology, forestry, regional planning, education, mapping, and global change research. Landsat images are also invaluable for emergency response and disaster relief.
This document is under the U.S. Geological Survey (USGS) LNext Project Configuration Control Board (CCB) control. Please submit changes to this document, as well as supportive material justifying the proposed changes, via a Change Request (CR) to the Process and Change Management Tracking Tool.
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Document History
Document Number
Document Version
Publication Date
Change Number
LSDS-2389 1.0 November 2022 CR 21223
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Contents
Executive Summary ..................................................................................................... iii Document History ........................................................................................................ iv Contents ......................................................................................................................... v List of Figures ............................................................................................................... v List of Tables ................................................................................................................ vi Section 1 Introduction
1.1 Background
1.2 Purpose
1.3 Scope
1.4 References
1.4.1 Applicable Documents
1.4.2 Reference Documents
Section 2 LNext Mission Overview
2.1 Mission Statement
2.2 Mission Background
2.3 Mission Objectives
2.4 Mission Implementation
2.4.1 Space Segment
2.4.2 Ground Segment
2.4.3 Launch Segment
Section 3 LNext Design Reference Case Overview
3.1 Key Features
3.2 Spreadsheet Format
3.3 DRC-18 Generation Process
3.4 Narrative Description
3.4.1 Overview
3.4.2 Sun-Lit Land
3.4.3 Night Imaging
3.4.4 Calibrations
Section 4 Single Observatory, DRC-18 Figures Section 5 Constellation of Observatories, DRC-18 Figures Appendix A Acronyms Appendix B DRC-18 Table
List of Figures
Figure 2-1. Landsat Next Operations Concept Figure 3-1. DRC-18 All Activities Figure 3-2. Example of Off-Nadir Acquisition of Path 161 While On Path 162 Figure 4-1. DRC-18 Path Sequence per Day (Single Satellite)
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Figure 4-2. DRC-18 All Acquisitions Figure 4-3. DRC-18 Day 1 All Acquisitions Figure 4-4. DRC-18 Day 2 All Acquisitions Figure 4-5. DRC-18 Day 3 All Acquisitions Figure 4-6. DRC-18 Day 4 All Acquisitions Figure 4-7. DRC-18 Day 5 All Acquisitions Figure 4-8. DRC-18 Day 6 All Acquisitions Figure 4-9. DRC-18 Day 7 All Acquisitions Figure 4-10. DRC-18 Day 8 All Acquisitions Figure 4-11. DRC-18 Day 9 All Acquisitions Figure 4-12. DRC-18 Day 10 All Acquisitions Figure 4-13. DRC-18 Day 11 All Acquisitions Figure 4-14. DRC-18 Day 12 All Acquisitions Figure 4-15. DRC-18 Day 13 All Acquisitions Figure 4-16. DRC-18 Day 14 All Acquisitions Figure 4-17. DRC-18 Day 15 All Acquisitions Figure 4-18. DRC-18 Day 16 All Acquisitions Figure 4-19. DRC-18 Day 17 All Acquisitions Figure 4-20. DRC-18 Day 18 All Acquisitions Figure 4-21. DRC-18 All Instrument Calibrations Figure 4-22. DRC-18 Off-Nadir Acquisitions Figure 4-23. DRC-18 Night Acquisitions Figure 5-1. WRS-3 Path Number for Each Observatory for Each Orbit Figure 5-2. Constellation Day 1 Land Acquisitions Figure 5-3. Constellation Day 2 Land Acquisitions Figure 5-4. Constellation Day 3 Land Acquisitions Figure 5-5. Constellation Day 4 Land Acquisitions Figure 5-6. Constellation Day 5 Land Acquisitions Figure 5-7. Constellation Day 6 Land Acquisitions
List of Tables
Table 1-1. Applicable Documents Table 1-2. Reference Documents Table 3-1. DRC-18 Table Definitions
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Section 1 Introduction
1.1 Background
The Landsat Next (LNext) mission is a component of the Sustainable Land Imaging (SLI) Program conducted jointly by the National Aeronautics and Space Administration (NASA) and U.S. Geological Survey (USGS) of the Department of the Interior (DOI).
LNext’s mission plan is in keeping with the Landsat programmatic goals stated in the United States Code (USC) Title 15, Chapter 82 “Land Remote Sensing Policy” (derived from the Land Remote Sensing Policy Act of 1992). This policy requires that the Landsat program provide data into the future that are sufficiently consistent with previous Landsat data, allowing the detection and quantitative characterization of changes in or on Earth’s surface. LNext was conceived as a follow-on mission to the highly successful Landsat series of missions that has provided satellite coverage of continental surfaces since 1972. The data from these missions constitute the longest continuous record of Earth’s surface as seen from space in support of science and user applications.
LNext is intended to ensure that Landsat-like data will be provided to the USGS National Satellite Land Remote Sensing Data Archive (NSLRSDA) for at least five years.
1.2 Purpose
This document provides an overview of the LNext mission operational scenarios over an eighteen-day period referred to as the Design Reference Case – 18 Days (DRC-18).
The scenario spans 18 days because that is the repeat period of the LNext Worldwide Reference System-3 (WRS-3) grid. The DRC-18 can be used to estimate the typical orbital data volume from the instrument and spacecraft during imaging and calibrations, as well as for required ancillary and housekeeping data.
The DRC-18 itself is stored in an Excel spreadsheet and is tracked with this document as one Configuration Item (CI) via Document Control Number (DCN) LSDS-2389. It is available on the Landsat Next Configuration Management System.
The DRC-18 currently documents the image acquisitions for a single satellite over the 18 day WRS-3 repeat cycle. An approximation of the image acquisitions for all of the satellites in the LNext constellation is depicted in Section 5.
1.3 Scope
This document describes the image acquisition cadence for a single satellite for the LNext mission. All references to instrument calibration activities are notional at this time and have been based on historical calibrations performed on the Landsat 8 (L8) and Landsat 9 (L9) missions. Specific instrument calibrations for the LNext mission will be determined by the LNext instrument provider and the joint USGS and NASA Calibration
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and Validation (Cal/Val) Team with the results being incorporated into follow-up versions of this document.
1.4 References
1.4.1 Applicable Documents
The documents in Table 1-1 are considered to form a part of this document.
Document Number Document Title LSDS-2389 Landsat Next DRC-18 Spreadsheet
LNEXT-SYS-DESC-0018 Landsat Next Worldwide Reference System-3 (WRS-3) LNEXT-SYS-PLAN-0007 Landsat Next Mission Operations Concept Document (OCD)
Table 1-1. Applicable Documents
1.4.2 Reference Documents
The documents in Table 1-2 provide additional background and context for this document.
Document Number Document Title LNEXT-MGMT-REQ-0001 Landsat Next Program-Level Requirements Appendix (PLRA) LNEXT-SYS-REQ-0002 Landsat Next Science and Mission Requirements Document (SMRD)
Table 1-2. Reference Documents
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Section 2 LNext Mission Overview
2.1 Mission Statement
Landsat Next, consistent with United States (U.S.) law and government policy, will continue the Landsat program's acquisition, archival, and distribution of multi-spectral imagery affording global, synoptic, and repetitive coverage of the Earth's land surfaces at a scale where natural and human-induced changes can be detected, differentiated, characterized, and monitored over time.
2.2 Mission Background
Following the successful launch of Landsat 8 (formally named Landsat Data Continuity Mission, LDCM) in February 2013, and during the development of Landsat 9, the United States Geological Survey (USGS) and National Aeronautics and Space Administration (NASA) recognized the need to assemble a team of experts from within both agencies to evaluate how to inform an acquisition strategy for the Landsat mission to follow Landsat 9. The NASA-USGS Joint Agency Sustainable Land Imaging (SLI) Architecture Study Team (AST) was formed in September 2018 and was tasked with investigating how to best satisfy the diverse set of user needs collected in the USGS “User Needs for the Sustainable Land Imaging Program – Release 2.0.” These investigations resulted in a set of recommendations to the headquarters of both agencies, delivered in December 2019. The highest-recommended “Roadmap 1” architecture described a small constellation of “superspectral” space-based sensors that would substantially improve the spectral, spatial, and temporal capabilities of previous Landsat missions, while continuing to satisfy the primary goal of ensuring a highly calibrated data set that maintains compatibility with the legacy data of the Earth’s land mass held in the National Satellite Land Remote Sensing Data Archive (NSLRSDA) at USGS’s Earth Resources and Observation Science (EROS) Center. In April 2020 NASA/Goddard Space Flight Center (GSFC) received authorization to initiate the Landsat Next project consistent with the AST’s Roadmap 1 recommendation.
The goal of Landsat Next is to continue the acquisition, archival, and distribution of multi-spectral imagery affording global, synoptic, and repetitive coverage of the Earth's land surfaces at a scale where natural and human-induced changes can be detected, differentiated, characterized, and monitored over time. This goal is in keeping with the Landsat programmatic goals stated in both the Commercial Space Act of 1998 (Public Law 105-303) and the Land Remote Sensing Policy Act of 1992 (Public Law 102-555).
This policy requires that the Landsat Program provide data into the future that is sufficiently consistent with previous Landsat data to allow the detection and quantitative characterization of changes in or on the land surface of the globe.
Landsat Next continues the long-running partnership of NASA and USGS, with NASA providing the space and launch segments and USGS providing the ground system, providing the longest continuous global record of the Earth’s surface. The Landsat series of satellites have continuously acquired multispectral images of the global land surface since the launch of the Earth Resources Technology Satellite (ERTS, later
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renamed Landsat 1) in 1972. The Landsat data archive constitutes the longest continuous moderate-resolution record of the global land surface as viewed from space.
2.3 Mission Objectives
Landsat Next has these major mission objectives:
• Collect and archive moderate resolution multispectral image data and thermal image data, affording seasonal coverage of the global landmass for a continuous period of not less than five (5) years.
• Ensure that Landsat Next data are sufficiently consistent with data from the earlier Landsat missions in terms of relative acquisition geometry, calibration, coverage characteristics, spectral characteristics, output product quality, and data availability to permit studies of land cover and land use change over multi-decadal periods.
• Ensure Landsat Next is responsive to critical emerging user needs and applications as characterized by periodic assessment, currently the User Needs for the Sustainable Land Imaging Program July 2018, Release 2.0, and identified by the operational requirements for collection, processing, archiving, and distribution of land surface data to the United States Government and other users.
• Distribute Landsat Next data products to the general public on a nondiscriminatory basis
2.4 Mission Implementation
NASA and USGS each have specific responsibilities for Landsat Next and will deliver the major elements to the overall mission. NASA will provide the Space and Launch Segments of Landsat Next, and USGS will provide the Ground System and mission operations. NASA/GSFC will provide overall Landsat Next project management, mission system engineering, and mission assurance during development and will transition the mission to USGS following on-orbit commissioning.
The Landsat Next post-launch nominal mission operations concept is shown graphically in the Figure below.
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Figure 2-1. Landsat Next Operations Concept
2.4.1 Space Segment
NASA/GSFC will provide the Space Segment via competitive procurements for the science instruments and the spacecraft bus. The Space Segment will consist of a constellation of three observatories flying in coordinated sun-synchronous orbits at 653km altitude, each with nominally identical spacecraft and instrument suites. The observatories will be equally spaced in the orbit, providing in aggregate a six-day ground repeat period at the equator.
The instrument suites will each provide 26 spectral bands with a maximum ground sampling distance of 10m-60m dependent on the spectral band, covering a swath on the ground of approximately 164km on a ground track defined by a world-wide reference system known as WRS-3.
2.4.2 Ground Segment
The Landsat Ground Segment currently supports mission operations for Landsats 8 and
9. Landsat Next takes advantage of developments on these missions and will upgrade and expand the current systems to accommodate Landsat Next. The Landsat Ground Segment consists of the Ground System (GS) and its external interfaces, including NASA institutional services. The GS includes the Landsat Multi-Satellite Operations Center (LMOC), the Ground Network (GN), and the Data Processing and Archive System (DPAS). External interfaces include NASA's Near Space Network (NSN) and NASA ACCESS Space relay (i.e. TDRSS) and government/commercial ground station,
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NASA/GSFC Conjunction Assessment and Risk Analysis (CARA) and its NASA/GSFC Flight Dynamics Facility, along with other external interfaces.
The LMOC, located at GSFC, provides the primary means to control and monitor the Landsat Next constellation. The Landsat Next Flight Operations Team (FOT) at the LMOC performs mission planning and scheduling, command and control, health and status monitoring, orbit and attitude maintenance, performance analysis, onboard memory management, and flight and ground software maintenance. The FOT utilizes LMOC functionality to detect, investigate and resolve spacecraft anomalies and monitor the instrument image collections from the onboard constellation and generate special image collections. The LMOC ingests, processes and archives data via the GN.
The GN includes geographically dispersed ground station resources for mission execution, and includes both the Landsat Ground Network (LGN) and a wideband or cloud-based data routing capability to transfer both science data to DPAS, and TT&C data to the LMOC. The LGN consists of US Government-owned, international, and commercial ground stations, and provides communication capability for each observatory of the constellation for commanding and housekeeping data via S-Band two-way links. The LGN will also receive science mission data from each observatory via high-rate Ka-band downlinks.
The DPAS ingests, processes, and archives LNext mission data from the GN. The DPAS also provides a long-term archive capability for raw data and allows the user community to query, download, and directly interact in the cloud with Landsat Next science products, via a public-facing web portal for receiving data products. The DPAS is located at USGS Earth Resources Observation and Science (EROS) near Sioux Falls, South Dakota.
2.4.3 Launch Segment
The Launch Segment will provide the assets and services associated with the Launch Vehicle (LV) and the constellation-to-LV integration. This will include the LV; all Launch Vehicle-Ground Support Equipment (LV-GSE), property, and facilities to integrate the constellation to the LV and verify their integration; and prelaunch testing with ground-based functions. The launch vehicle and launch site are TBD. The three observatories comprising the Landsat Next constellation will be launched together on the same launch vehicle.
Sections 2.0-2.4.3 were generated using Landsat Next Common Boilerplate (LNEXT- MGMT-DESC-0005) Rev A Draft 1
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Section 3 LNext Design Reference Case Overview
3.1 Key Features
There are several key features for the activities that take place in the 18-day period depicted in the DRC-18. They are:
• The DRC-18 starts at path 122, row 1 on the WRS-3 grid, which is near the North Pole
• The start date for the DRC-18 is March 12, 2022. There is no contractual or requirement implication to this start date. With this start date it is possible to perform a monthly lunar calibration maneuver.
• Each day has approximately 14.8 orbits
• The path/row pairs represent coordinates in the WRS-3 grid
• There are both imaging and placeholders for instrument calibration activities
Figure 3-1. DRC-18 All Activities
3.2 Spreadsheet Format
The DRC-18 is provided as a Microsoft Excel spreadsheet and is tracked with this document as one Configuration Item (CI) via Document Control Number (DCN) LSDS- 2389. There is one row containing the names of all the columns, followed by 65,720
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rows of data. There are 265 paths in the WRS-3, and 248 rows per path, resulting in 65,720 distinct path-row locations. The detailed definition for each column in the DRC is provided in Table 3-1.
Column Name Description DRC Day This field counts “UTC Days” as covered by the DRC, with numbering starting at 1. It does NOT count whole 24 hour periods starting from the first second of the
DRC.
Scene Center Time The Coordinated Universal Time (UTC) of the center point for each WRS-3 Path and Row location in the table
Path The WRS-3 Path number Row The WRS-3 Row number
Collection A single value denoting what science operation takes place in this location, consistent with the following mapping:
0 – no activity 1 – Nominal Earth Imaging Acquisition 2 – Standard Instrument Calibration 3 – Solar Calibration 4 – Yaw Calibration 5 – Lunar Calibration 6 – Night Imaging or Collection with Sun Angle < 5 degrees 7 – Off-Nadir Acquisition
Sun Angle The Solar incidence angle to the WRS-3 scene center at time of collection. This value does not consider terrain features. The scene is illuminated when values are positive and in the dark when the values are negative.
Table 3-1. DRC-18 Table Definitions
The entries in the DRC-18 table are arranged chronologically, in the order flown. This time-ordered sequence of high-level operations is provided to allow analysis of the impacts and supportability of these operations, whether by spreadsheet or more elaborate means.
3.3 DRC-18 Generation Process
With the generation of the new WRS-3 definition for LNext, a new set of acquisitions is needed. To generate the land imaging acquisitions, the WRS-3 grid was overlayed onto to the WRS-2 grid to provide a mapping between which WRS-3 scenes overlapped which WRS-2 scenes. The Landsat 9 Land Collection Request (LCR) is used by the Landsat Flight Operations Team to determine which WRS-2 scenes should be collected
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on a routine basis by the Landsat 8 and Landsat 9 satellites. WRS-3 scenes were identified as potentially being collected if any part of the scene overlapped a WRS-2 scene that is contained within the current LCR. These potential scenes are then evaluated with the criteria outlined in the following sections to determine if they should be acquired. The end result is that the DRC-18 captures at least all of the areas currently covered by Landsat 9 LCR operations. It is expected that further refinement of the LNext acquisitions will occur in coordination with the Science Team and will be reflected in future updates of this document.
3.4 Narrative Description
This section presents a narrative overview of the DRC-18. The operations referenced in this section are described in more detail in the Mission Operations Concept Document
(LNEXT-SYS-PLAN-0007).
3.4.1 Overview
This 18-day period of operations reflects the LNext acquisition pace for the given time of year. As the duration of sunlight varies throughout the year, the distribution of imaging also varies.
There are three primary types of science operations described in this DRC: nadir-looking sunlit land; selective night imaging, and a variety of calibrations. These are each described further in the following sections.
3.4.2 Sun-Lit Land
The core science component of the DRC-18 is the nadir-viewing earth imaging data collections, also referred to as “nominal Earth imaging.” These are scheduled over all land areas that are illuminated by sunlight at an angle of five degrees above horizontal, or greater. The Landsat project maintains a land database that defines all the targets of interest, which also include coastal/littoral targets, coral reefs, small islands and some land-fast ice/glaciers.
The amount of sun-lit land being flown over varies across the 18 days of the WRS-3 cycle, and thus the 18 days of the DRC-18. Total DRC-18 sun-lit daily scene counts range from a low of 762 to a high of 887, driven primarily by this geographic variation in coverage. The longest interval present in the DRC-18 is 84 scenes, occurring on days 8, 9, 13 and 16 of the DRC-18, spanning Eurasia and Africa. This may not be the longest interval possible, but it is the longest interval in this reference case.
There is one type of acquisition in this category that requires a spacecraft maneuver - Off-Nadir acquisitions. The DRC-18 includes a pair of sun-lit Off-Nadir acquisitions in the South Pacific. These are arranged one path East and one path West of path 144, such that path 144, row 84 will be imaged twice during the 18 days.
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3.4.3 Night Imaging
Night Imaging consists of nadir-viewing earth imaging collections, taken when there is no direct solar illumination of the ground. The DRC-18 night targets consist of large areas being monitored for fires, active volcanoes, and spurious urban areas.
There is one acquisition in this category that requires a spacecraft maneuver - Off-Nadir acquisitions. The DRC-18 includes a single, ascending orbit Off-Nadir acquisitions off the coast of California. On Path 162, this off-nadir image collection is arranged to be one path East, such that path 161, rows 211, 212, and 213 will be imaged.
Figure 3-2. Example of Off-Nadir Acquisition of Path 161 While On Path 162
3.4.4 Calibrations
Accurate radiometry is a hallmark of the Landsat program. Maintaining the required accuracy requires several routine calibration collections during a cycle. At this time, it is not known what type of calibrations are going to be needed for LNext or the frequency at which these calibrations will be needed. For the purposes of this DRC-18, some L8 and L9 calibration types are used to show how these calibrations are integrated with the nominal imaging cadence.
The most prominent calibrations are the “Nominal Instrument Calibrations”, which occur just before the descending (sunlit) image acquisitions, and again after the last descending acquisitions. For this version of the DRC-18, it is assumed that these calibrations will take two scenes (or approximately 46 seconds) to complete and are
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spaced such that there is at least two scenes worth of non-imaging activities on either side of the calibration.
The other calibrations in the DRC-18 require a spacecraft maneuver. The Lunar calibration requires three or less orbits to complete, with the lunar imaging activities occurring during each eclipse period. The Lunar calibrations may be required to be completed within the stated moon phase angle, which is approximately 3 orbits. The Lunar calibrations are notionally scheduled on Day 5 of the DRC-18 on Paths 178, 196, and 214. There is a Yaw calibration on Day 12, Path 2 Rows 3 through 18. There are 3 Solar (Diffuser) Calibrations shown on Day 3 Path 240 Row 11, Day 9 Path 234 Row 10, and Day 16 Path 233 Row 11 so that there is a calibration about every 6 days on average.
All the calibration activities listed here are notional in nature and the DRC-18 will be updated with specific instrument calibration activities for LNext once they are known.
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Section 4 Single Observatory, DRC-18 Figures
This section provides a graphical representation of the data acquisitions defined within the DRC-18 Microsoft Excel spreadsheet for a single observatory.
Figure 4-1. DRC-18 Path Sequence per Day (Single Satellite)
Figure 4-2. DRC-18 All Acquisitions
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Figure 4-3. DRC-18 Day 1 All Acquisitions
Figure 4-4. DRC-18 Day 2 All Acquisitions
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Figure 4-5. DRC-18 Day 3 All Acquisitions
Figure 4-6. DRC-18 Day 4 All Acquisitions
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Figure 4-7. DRC-18 Day 5 All Acquisitions
Figure 4-8. DRC-18 Day 6 All Acquisitions
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Figure 4-9. DRC-18 Day 7 All Acquisitions
Figure 4-10. DRC-18 Day 8 All Acquisitions
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Figure 4-11. DRC-18 Day 9 All Acquisitions
Figure 4-12. DRC-18 Day 10 All Acquisitions
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Figure 4-13. DRC-18 Day 11 All Acquisitions
Figure 4-14. DRC-18 Day 12 All Acquisitions
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Figure 4-15. DRC-18 Day 13 All Acquisitions
Figure 4-16. DRC-18 Day 14 All Acquisitions
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Figure 4-17. DRC-18 Day 15 All Acquisitions
Figure 4-18. DRC-18 Day 16 All Acquisitions
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Figure 4-19. DRC-18 Day 17 All Acquisitions
Figure 4-20. DRC-18 Day 18 All Acquisitions
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Figure 4-21. DRC-18 All Instrument Calibrations
Figure 4-22. DRC-18 Off-Nadir Acquisitions
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Figure 4-23. DRC-18 Night Acquisitions
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Section 5 Constellation of Observatories, DRC-18 Figures
This section provides a graphical representation of the approximate land acquisitions for a three-observatory constellation using the same Land Collection Request (LCR). With three satellites, the entire WRS-3 grid is covered in 6 days. Calibrations and other special collections are not shown in the following figures.
Figure 5-1. WRS-3 Path Number for Each Observatory for Each Orbit
Figure 5-2. Constellation Day 1 Land Acquisitions
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Figure 5-3. Constellation Day 2 Land Acquisitions
Figure 5-4. Constellation Day 3 Land Acquisitions
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Figure 5-5. Constellation Day 4 Land Acquisitions
Figure 5-6. Constellation Day 5 Land Acquisitions
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Figure 5-7. Constellation Day 6 Land Acquisitions
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Appendix A Acronyms
AST Architecture Study Team Cal/Val Calibration and Validation CARA Conjunction Assessment and Risk Analysis CCB Configuration Control Board CI Configuration Item CR Change Request DCN Document Control Number DOI Department of the Interior DPAS Data Processing and Archive System DRC Design Reference Case EROS Earth Resources Observation and Science ERTS Earth Resources Technology Satellite FOT Flight Operations Team GN Ground Network GS Ground System GSE Ground Support Equipment GSFC Goddard Space Flight Center L8 Landsat 8 L9 Landsat 9 LCR Land Collection Request LDCM Landsat Data Continuity Mission LGN Landsat Ground Network LMOC Landsat Multi-Satellite Operations Center LNext Landsat Next LSDS Land Satellites Data System LV Launch Vehicle NASA National Aeronautics and Space Administration NSLRSDA National Satellite Land Remote Sensing Data Archive NSN Near Space Network OCD Operations Concept Document PLRA Program-Level Requirements Appendix SLI Sustainable Land Imaging SMRD Science Mission Requirements Document TBD To Be Determined TT&C Telemetry, Tracking, and Control USC United States Code USGS U.S. Geological Survey UTC Coordinated Universal Time WRS Worldwide Reference System
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Appendix B DRC-18 Table
The DRC-18 table is attached to this document.
If viewing this document in Word, double-click the icon to open the table.
DRC-18 -v1.0.xlsx
If viewing this document in a PDF, to open the DRC-18 table:
1. Ensure the PDF is open in the Adobe app, not in a browser
2. Click the arrow to expand the sidebar, if needed
3. Click the paper clip icon
4. Double-click the attachment
Alternatively, a copy of the table can be found at https://igskmncnvs097.cr.usgs.gov/docushare/dsweb/View/Collection-46841 https://igskmncnvs097.cr.usgs.gov/docushare/dsweb/View/Collection-46841
| Executive Summary |
| Document History |
| Contents |
| List of Figures |
| List of Tables |
| Section 1 Introduction |
| 1.1 Background |
| 1.2 Purpose |
| 1.3 Scope |
| 1.4 References |
| 1.4.1 Applicable Documents |
| 1.4.2 Reference Documents |
| Section 2 LNext Mission Overview |
| 2.1 Mission Statement |
| 2.2 Mission Background |
| 2.3 Mission Objectives |
| 2.4 Mission Implementation |
| 2.4.1 Space Segment |
| 2.4.2 Ground Segment |
| 2.4.3 Launch Segment |
| Section 3 LNext Design Reference Case Overview |
| 3.1 Key Features |
| 3.2 Spreadsheet Format |
| 3.3 DRC-18 Generation Process |
| 3.4 Narrative Description |
| 3.4.1 Overview |
| 3.4.2 Sun-Lit Land |
| 3.4.3 Night Imaging |
| 3.4.4 Calibrations |
| Section 4 Single Observatory, DRC-18 Figures |
| Section 5 Constellation of Observatories, DRC-18 Figures |
| Appendix A Acronyms |
| Appendix B DRC-18 Table |
DRC-18_Land_Calibrations_Manual
DRC Cycle Day Scene Center Time WRS-3 Path WRS-3 Row Collection Type SunAngle
Day 1 Mar 12 2022 01:04:17.1 122 1 2 4.3596911529
Day 1 Mar 12 2022 01:04:40.7 122 2 2 5.60286094
Day 1 Mar 12 2022 01:05:04.4 122 3 0 6.8443917832
Day 1 Mar 12 2022 01:05:28.0 122 4 0 8.0845077041
Day 1 Mar 12 2022 01:05:51.7 122 5 0 9.3232894435
Day 1 Mar 12 2022 01:06:15.4 122 6 0 10.5606895667
Day 1 Mar 12 2022 01:06:39.0 122 7 0 11.7965752638
Day 1 Mar 12 2022 01:07:02.7 122 8 0 13.0307596069
Day 1 Mar 12 2022 01:07:26.4 122 9 0 14.2630235562
Day 1 Mar 12 2022 01:07:50.0 122 10 1 15.4931285671
Day 1 Mar 12 2022 01:08:13.7 122 11 1 16.720819903
Day 1 Mar 12 2022 01:08:37.4 122 12 1 17.945829514
Day 1 Mar 12 2022 01:09:01.0 122 13 1 19.1678776592
Day 1 Mar 12 2022 01:09:24.7 122 14 1 20.3866713256
Day 1 Mar 12 2022 01:09:48.3 122 15 1 21.6019013602
Day 1 Mar 12 2022 01:10:12.0 122 16 1 22.8132444721
Day 1 Mar 12 2022 01:10:35.7 122 17 1 24.0203582962
Day 1 Mar 12 2022 01:10:59.3 122 18 1 25.2228808975
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Day 1 Mar 12 2022 03:21:32.1 140 101 0 25.2313086622
Day 1 Mar 12 2022 03:21:55.8 140 102 0 24.0280782973
Day 1 Mar 12 2022 03:22:19.5 140 103 0 22.8202253642
Day 1 Mar 12 2022 03:22:43.1 140 104 0 21.6081056682
Day 1 Mar 12 2022 03:23:06.8 140 105 0 20.3920535458
Day 1 Mar 12 2022 03:23:30.5 140 106 1 19.1723838984
Day 1 Mar 12 2022 03:23:54.1 140 107 1 17.9493916501
Day 1 Mar 12 2022 03:24:17.8 140 108 1 16.7233538607
Day 1 Mar 12 2022 03:24:41.4 140 109 1 15.4945304689
Day 1 Mar 12 2022 03:25:05.1 140 110 1 14.2631629901
Day 1 Mar 12 2022 03:25:28.8 140 111 1 13.029474077
Day 1 Mar 12 2022 03:25:52.4 140 112 1 11.7936646742
Day 1 Mar 12 2022 03:26:16.1 140 113 1 10.5559095592
Day 1 Mar 12 2022 03:26:39.8 140 114 1 9.3163499754
Day 1 Mar 12 2022 03:27:03.4 140 115 1 8.0750820818
Day 1 Mar 12 2022 03:27:27.1 140 116 1 6.8321461671
Day 1 Mar 12 2022 03:27:50.8 140 117 1 5.5875183826
Day 1 Mar 12 2022 03:28:14.4 140 118 0 4.3411348687
Day 1 Mar 12 2022 03:28:38.1 140 119 0 3.0929876972
Day 1 Mar 12 2022 03:29:01.8 140 120 2 1.8433252505
Day 1 Mar 12 2022 03:29:25.4 140 121 2 0.5928377814
Day 1 Mar 12 2022 03:29:49.1 140 122 0 -0.6574498278
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Day 1 Mar 12 2022 03:32:34.7 140 129 0 -9.3631505454
Day 1 Mar 12 2022 03:32:58.4 140 130 0 -10.6006522451
Day 1 Mar 12 2022 03:33:22.1 140 131 0 -11.8366333329
Day 1 Mar 12 2022 03:33:45.7 140 132 0 -13.0709067981
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Day 1 Mar 12 2022 03:36:07.7 140 138 0 -20.4272130846
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Day 1 Mar 12 2022 03:37:18.7 140 141 0 -24.0609955657
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Day 1 Mar 12 2022 03:38:06.0 140 143 0 -26.4610839602
Day 1 Mar 12 2022 03:38:29.7 140 144 0 -27.6532420387
Day 1 Mar 12 2022 03:38:53.4 140 145 0 -28.8395704234
Day 1 Mar 12 2022 03:39:17.0 140 146 0 -30.0196048027
Day 1 Mar 12 2022 03:39:40.7 140 147 0 -31.1928476381
Day…
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