Attachment E-5 ACXUIID.pdf

Effective Date: August 12, 2021 418-XO-ACXUIID-0072 Expiration Date: Five years from date of last signature Baseline Version 1.1 Responsible Organization: GeoXO Flight Project/Code 418

Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX)

Unique Instrument Interface Document (UIID) Signature page

Prepared by:

Electronically approved 09/15/2021

Erin M. Farrell Date GeoXO Flight Project, Instrument Systems Engineer NASA GSFC, Code 418

Electronically approved 09/15/2021

Patrick Conforti Date GeoXO Flight Project, Instrument Systems Engineer NASA GSFC, Code 418

Reviewed by:

Electronically approved 07/14/2021

Alexander Krimchansky Date GeoXO Flight Project, Mission Systems Engineer NASA GSFC, Code 599

Approved by:

Electronically approved 07/13/2021

Monica Todirita Date GeoXO Flight Project, Deputy Project Manager NOAA GSFC, Code 418

/GeoXO Flight Project ACX

ACXUIID

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique Instrument Interface Document (UIID)

Version: 1.1 Printed by: rkhoover Printed on: Tuesday, November 9, 2021

No filter applied.

No sort applied.

Generated from DOORS 9.7.2.4

Contents

1 1Scope

1.1 1Document Overview

1.2 1Requirements Terminology

1.3 2Order of Precedence

2 3Documents

2.1 3Applicable Documents

2.2 3Reference Documents

3 4Allocations

3.1 4Command and Data Handling

3.1.1 4Instrument-to-Spacecraft Science Rate

3.1.2 4Telemetry Data Rate

3.1.3 4Application Process Identifiers

3.1.4 4GeoXO Reliable Data Delivery Protocol Packet Rate

3.2 4Power

3.2.1 4Average Operational Power

3.2.2 4Maximum Operational Power

3.2.3 4Average Survival Power

3.2.4 4Maximum Survival Power

3.3 5Mechanical

3.3.1 5Mass Properties

3.3.2 5Cabling Between Units

3.3.3 5Volume

3.3.4 6Optical Port Field-of-View

3.3.5 6Radiator Field of View

3.3.6 6Field-of-View in the +X direction

3.3.7 7Mounting

3.4 7Mechanical Disturbances (CCR X00040)

3.4.1 7Integrated Angular Momentum

3.4.2 7Angular Momentum Limits

3.4.3 8Instrument Translation Acceleration Limits

3.4.4 10Predicted Interface Force and Torque (PIFT) Responses

3.4.5 10Spacecraft Mounting Stiffness

3.4.6 10External Sourced Translation Acceleration Limits

Project: GeoXO Flight Project ACX Module: ACXUIID Baseline Version: 1.1

Contents ii

3.4.7 12Instrument Torque Limit (CCR X00040)

3.5 12Thermal

3.6 12Instrument Purge Requirements

4 13Constraints

5 14GIRD Deviations

5.1 14On-Orbit Concept

6 15Design Verification Requirements

6.1 15Radiated Emissions, Electric Field (RE 102)

6.2 15Reserved (CCR X00040)

7 16Acronyms

Contents iii

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ID

ACXUIID1

ACXUIID2

ACXUIID3

ACXUIID4

ACXUIID5

ACXUIID6

ACXUIID7

ACXUIID8

ACXUIID9

ACXUIID10

ACXUIID11

Object Number

1.0-1

1.0-2

1.0-3

1.0-4

1.0-5

1.0-6

1.1

1.1.0-1

1.2

1.2.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

1 Scope The purpose of this Unique Instrument Interface Document (UIID) is two-fold. The first is to allocate GeoXO series spacecraft resources to the Atmospheric Composition Instrument (ACX). The second is to serve as a core building block on which the ACX-spacecraft interface can be designed. This document levies requirements on both the spacecraft and instrument.

This UIID will govern the development of an Interface Control Document (ICD), which will be a joint activity of the ACX and spacecraft contractors.

The ACX ICD establishes the details of the electrical, communications, mechanical, thermal, integration and test, and command and data handling (C&DH) interfaces between the ACX instrument and the GeoXO spacecraft.

The ACX is a hyperspectral spectrometer for air quality and environmental observation. The Instrument senses molecular absorption in ultraviolet and visible wavelengths. Small absorption levels necessitate fine spectral resolution and high SNR. ACX applications include air quality forecasting capability (O3, NO2, Aerosols, H2CO, SO2, C2H2O2), and hazard and fire forecasting and warnings (O3, NO2, PM2.5, H2CO, SO2). Key performance features are fine spectral resolution, coarse spatial resolution, UV - visible wavelength range, high scan rate, and high SNR. The instrument collects data on a three-axis body-stabilized satellite in geostationary orbit.

Data availability, radiometric quality, simultaneous data collection, coverage rates, scan flexibility, and minimizing data loss due to the sun are prime requirements of the system. The instrument requires primary power, and command input data from the spacecraft. Instrument output data to the spacecraft contains instrument information, instrument telemetry and ancillary data.

The sensor unit contains the optical system, scanner, detectors and their cooling/heating systems and directly related electronics. The (optional) electronics unit contains the power supply module, command, control, and data processing circuitry. If required, an auxiliary electronics unit may be used for active detector temperature regulation.

1.1 Document Overview

Together, the General Interface Requirements Document (GIRD) and the ACX UIID establish the ACX-spacecraft interface requirements. The GIRD applies to all GeoXO instruments while the ACX UIID is specific to the ACX. Section 1 explains the use of this document. Section 2 lists reference documents. Section 3 allocates spacecraft resources, such as mass, power, and data rate, to the ACX instrument. Section 4 contains government-accepted operation constraints. Section 5 contains government-accepted deviations from the GIRD. Section 6 contains Design Verification Requirements. Section 7 contain a list of acronyms used within this document.

1.2 Requirements Terminology

The following requirements terminology is used throughout this document:

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ID

ACXUIID12

ACXUIID13

ACXUIID14

ACXUIID15

ACXUIID16

ACXUIID17

ACXUIID18

ACXUIID19

ACXUIID20

ACXUIID21

ACXUIID22

ACXUIID23

ACXUIID24

Object Number

1.2.0-2

1.2.0-3

1.2.0-4

1.2.0-5

1.2.0-6

1.2.0-7

1.2.0-8

1.2.0-9

1.2.0-10

1.2.0-11

1.2.0-12

1.3

1.3.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

The term “shall” designates a requirement that must be achieved and is synonymous with the term “threshold.”

The term “should” designates a desired level of performance the government would like the contractor to strive towards achieving and is synonymous with the term “goal.”

All other terms, including “will”, only designate statements of fact or intentions of the government and are not to be interpreted as contractor requirements.

The term “TBD” means, “to be determined.” This is applied to requirements or values that have not been defined. The contractor is responsible for proposing a requirement or value and its corresponding rationale for all TBD requirements.

TBD requirement proposals are to be made in coordination with the government and may involve other contractors.

The contractor should request approval from the government before proceeding with its proposed TBD requirement or value.

The term “TBR” means, “to be reviewed.” This is applied to requirements or values that are subject to review by the government and the contractor. The contractor should review and suggest a modified value and rationale for all TBR requirements.

The “TBR” provides an indication that the value may change upon review.

TBR requirement proposals will be made in coordination with the government and may involve other contractors.

The contractor should request approval from the government before proceeding with its proposed TBR requirement or value.

The term “TBS” means, “to be supplied.” The government will supply TBS requirements. The government will provide a date or milestone at which each TBS requirement will be supplied.

The orbit reference frame (ORF) is defined in the GIRD. (CCR X00040)

1.3 Order of Precedence

The order of precedence of interface requirements documents is the UIID at the highest level, followed in order by the GIRD, ICD, and Instrument Description Document (IDD).

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ID

ACXUIID25

ACXUIID26

ACXUIID27

ACXUIID28

ACXUIID29

Object Number

2.1

2.1.0-1

2.2

2.2.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

2 Documents

2.1 Applicable Documents

The following documents of the exact issue shown form a part of this UIID to the extent specified herein. In the event of conflict between the documents referenced and the contents of this UIID the latter shall be the superseding requirement.

1. MIL-STD-461G – Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment, 11 December

2. 418-XO-GXIGIRD-0025 - General Interface Requirements Document (GIRD)

2.2 Reference Documents

The following documents provide reference material for part of this document.

1. CCSDS 133.0-B-2 - Space Packet Protocol, Blue Book, Issue 2, June 2020

2. CCSDS 301.0-B-4 - Time Code Formats. Blue Book. Issue 4, November 2010

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ID

ACXUIID30

ACXUIID31

ACXUIID32

ACXUIID33

ACXUIID34

ACXUIID35

ACXUIID36

ACXUIID37

ACXUIID38

ACXUIID39

ACXUIID40

ACXUIID41

ACXUIID42

ACXUIID43

ACXUIID44

ACXUIID45

ACXUIID46

ACXUIID47

ACXUIID48

Object Number

3.0-1

3.1

3.1.1

3.1.1.0-1

3.1.2

3.1.2.0-1

3.1.3

3.1.3.0-1

3.1.4

3.1.4.0-1

3.2

3.2.1

3.2.1.0-1

3.2.2

3.2.2.0-1

3.2.3

3.2.3.0-1

3.2.4

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

3 Allocations The GeoXO spacecraft provides communications, power, and a platform for the ACX instrument. The following paragraphs allocate these resources to ACX.

3.1 Command and Data Handling

3.1.1 Instrument-to-Spacecraft Science Rate

The instrument science and engineering data rate, including all overhead associated with Consultative Committee for Space Data Systems (CCSDS) packetization by the instrument, at the spacecraft interface shall not exceed 75 million bits per second when averaged over any 5 second period.

3.1.2 Telemetry Data Rate

Housekeeping telemetry data rate, including all overhead associated with CCSDS packetization by the instrument, at the spacecraft interface shall not exceed 1024 bits per second when averaged over any 5 second period.

3.1.3 Application Process Identifiers

The ACX shall use no more than 255 consecutive Application Process Identifiers (APIDs) for science, telemetry, and command packets.

3.1.4 GeoXO Reliable Data Delivery Protocol Packet Rate

The ACX shall transmit to the spacecraft no more than 400 GOES Reliable Data Delivery Protocol (GRDDP) Packets per second. (CCR X00040)

3.2 Power

3.2.1 Average Operational Power

The ACX shall draw operational average power, inclusive of heaters, of no more than 150 Watts from up to four total feeds including primary and redundant.

Operational average power is the total power into an instrument averaged over any 5 minute period.

3.2.2 Maximum Operational Power

The ACX shall draw operational maximum power of no more than 240 Watts from up to four total feeds. Operational maximum power is the total power into an instrument averaged over any 20ms period.

3.2.3 Average Survival Power

The ACX shall draw average survival power of no more than 100 Watts. Average survival power is the total power into an instrument averaged over any 72 minute period.

3.2.4 Maximum Survival Power

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ID

ACXUIID49

ACXUIID50

ACXUIID51

ACXUIID52

ACXUIID53

ACXUIID54

ACXUIID55

ACXUIID56

ACXUIID57

ACXUIID58

ACXUIID59

Object Number

3.2.4.0-1

3.3

3.3.0-1

3.3.1

3.3.1.0-1

3.3.2

3.3.2.0-1

3.3.2.0-2

3.3.3

3.3.3.0-1

3.3.3.0-2

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

The ACX shall draw maximum survival power of no more than 150 Watts. Survival maximum power is the total power into an instrument averaged over any 20ms period.

3.3 Mechanical

The requirements in this section apply to the structural and mechanical components of the instrument flight units (sensor unit, electronics unit and, if applicable, auxiliary electronics unit).

3.3.1 Mass Properties

The ACX, including all units and cabling between units, shall have mass less than 171 kilograms.

3.3.2 Cabling Between Units

If there are external units mounted directly to the spacecraft, the ACX shall accommodate any cable length between the units up to but not exceeding the lengths of 4 meters.

Cables between ACX units shall be the responsibility of the ACX contractor.

3.3.3 Volume

The ACX sensor shall be mounted on the Earth Pointing Platform (EPP) or Nadir Deck of the spacecraft.

The ACX Sensor Unit stowed and operational (deployed) configurations, including mounts, thermal blankets and connectors, shall have dimensions that do not exceed the limits provided below.

Depth (Z direction, Nadir or interface plane): 1500 millimeters Width (X direction, parallel to orbit): 1290 millimeters Height (Y direction, normal to orbit): 1230 millimeters

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ID

ACXUIID67

ACXUIID68

ACXUIID69

ACXUIID70

ACXUIID71

ACXUIID72

ACXUIID73

ACXUIID74

ACXUIID75

ACXUIID76

ACXUIID77

ACXUIID78

ACXUIID79

ACXUIID80

Object Number

3.3.6.0-1

3.3.6.0-2

3.3.6.0-3

3.3.7

3.3.7.0-1

3.3.7.0-2

3.3.7.0-3

3.4

3.4.0-1

3.4.1

3.4.1.0-1

3.4.1.0-2

3.4.2

3.4.2.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

The spacecraft shall provide on the sensor unit's +X face, a clear calibration FOV of

7.5 degrees centered on the X-axis, in the X-Z plane, and 52.0 degrees centered on the X-axis, in the X-Y plane. (CCR X00040)

The spacecraft shall provide on the sensor unit's +X face a calibration glint free FOV of 66 degrees centered on the X-axis in the X-Z plane, and 80 degrees centered on the X-axis in the X-Y plane. Glint is defined as stray light from structures such as solar panels, antennas, or other sensors. (CCR X00040)

Reserved (CCR X00040)

3.3.7 Mounting

The spacecraft shall provide the instrument sensor unit a nadir-facing mounting surface.

The sensor unit mechanical interface shall lie within the anti-nadir plane of the sensor unit envelope.

The instrument sensor unit shall use kinematic mounts for its mechanical interface to the spacecraft.

3.4 Mechanical Disturbances (CCR X00040)

These requirements apply while the instrument is in orbit and operating.

3.4.1 Integrated Angular Momentum

The absolute value of the high pass filtered angular momentum integrated with respect to time shall not exceed the values listed in Filtered Integrated Angular Momentum Limits table. The filter is a second order Butterworth filter with a -3 dB cutoff frequency at 0.01 Hz.

ACX Integrated Angular Momentum Limits

Axis

Limit

(N‐m‐s2) roll 0.5 pitch 0.3 yaw 0.5

The satellite center of mass will be within 2 meters of the centroid of the sensor unit mounts.

3.4.2 Angular Momentum Limits

The absolute value of the high pass filtered angular momentum produced by the sensor unit referenced at the satellite center of mass shall not exceed the values listed in the Angular Momentum Limits table. The high pass filter is a second order Butterworth filter with a -3 dB cutoff frequency at 0.01 Hz.

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ID

ACXUIID80

ACXUIID81

ACXUIID82

ACXUIID83

ACXUIID84

Object Number

3.4.2.0-1

3.4.2.0-2

3.4.2.0-3

3.4.3

3.4.3.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

ACX Angular Momentum Limits

Axis Limit

(N‐m‐s) roll 0.1 pitch 0.05 yaw 0.1

Reserved (CCR X00040)

The absolute value of the band pass filtered instrument angular momentum in each orthogonal axis shall not exceed the values listed in the One-Sixth Octave Band Filtered Angular Momentum Limits table. The bandpass filters for this requirement are defined as a series of eighth-order Butterworth bandpass filters with -3 dB bandwidth of one sixth of an octave. The first filter in the series has its center frequency at 0.015625 Hz, and the center frequencies for the series are spaced at one-twelfth octave up to 10 Hz. The Bandpass‐Filtered Angular Momentum Limits apply to filters with center frequency greater than f1 and less than or equal to f2.

(CCR X00040)

ACX Bandpass‐Filtered Angular Momentum Limits f1 f2

Limit

(N‐m‐s)

0.01 0.25 0.05

0.25 1 0.02

1 10 0.015

3.4.3 Instrument Translation Acceleration Limits

The translational accelerations induced by the instrument sensor at each mount shall not exceed the limits specified in the Instrument-to-Spacecraft Linear Acceleration Limits table below. The accelerations are those induced by operation of the sensor unit while mounted to a flexible interface. The limits apply to each orthogonal axis after the acceleration is filtered using an eighth-order band pass Butterworth filter with -3dB frequencies at f1 and f2. Note that the filter has a fourth-order roll-off on both sides of the response. (CCR X00040)

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ID

ACXUIID84

ACXUIID85

ACXUIID86

Object Number

3.4.3.0-1

3.4.3.0-2

3.4.3.0-3

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

The translational accelerations induced by the instrument sensor unit at each mount shall produce an absolute peak acceleration Shock Response Spectra (SRS) less than the limits set in the Instrument to Spacecraft Linear Acceleration SRS/Q Limits Table. The limits apply to each orthogonal axis when using a quality factor, Q, of 50, and normalizing the SRS dividing by Q. The SRS is computed after the translational accelerations are filtered with a fourth-order high pass Butterworth filter with a -3dB cut off at 1.0Hz. For SRS resonant frequencies from 10.0Hz to

512.0 Hz, the limits are calculated using logarithmic interpolation for both frequency and acceleration terms in the Instrument to Spacecraft Acceleration SRS/Q Limits Table. (CCR X00040)

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ID

ACXUIID87

ACXUIID88

ACXUIID89

ACXUIID90

ACXUIID91

ACXUIID92

ACXUIID93

ACXUIID94

ACXUIID95

ACXUIID96

ACXUIID97

ACXUIID98

ACXUIID99

ACXUIID100

ACXUIID101

ACXUIID102

ACXUIID103

Object Number

3.4.4

3.4.4.0-1

3.4.4.0-2

3.4.4.0-3

3.4.4.0-4

3.4.4.0-5

3.4.4.0-6

3.4.4.0-7

3.4.4.0-8

3.4.4.0-9

3.4.4.0-10

3.4.4.0-11

3.4.5

3.4.5.0-1

3.4.5.0-2

3.4.6

3.4.6.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

3.4.4 Predicted Interface Force and Torque (PIFT) Responses

The ACX shall send predicted forces, torques and future times to the spacecraft in a CCSDS source packet per the Command and Data Handling section of the GIRD.

The ACX shall send to the spacecraft predicted forces and torques resulting from normal instrument operations including any calibration operations.

The ACX shall send to the spacecraft predicted forces and torques computed in the instrument coordinate system.

The ACX shall send to the spacecraft forces and torques predicted for a uniformly spaced series of future times.

The ACX shall increment the future time values for predicted forces and torques sent to the spacecraft by 50 ms.

The ACX shall send to the spacecraft predicted forces and torques 250 ms prior to the predicted time.

The ACX shall send to the spacecraft predicted forces and torques with the future time data using the P-field format in the GIRD.

The ACX shall send to the spacecraft predicted force data with a minimum resolution of 0.001 N.

The ACX shall send to the spacecraft predicted torque data with a minimum resolution of 0.001 N-m.

The ACX shall send to the spacecraft predicted force data with an accuracy of +/-

0.03 N.

The ACX shall send to the spacecraft predicted torque data with an accuracy of +/-

0.03 N-m.

3.4.5 Spacecraft Mounting Stiffness

The instrument shall meet its performance requirements while the sensor unit is mounted to a rigid plate supported at three flexible points with a first mode of 20 +/- 5 Hz and with the 6th mode less than 50 Hz.

The instrument shall meet its performance requirements when the diagonal modal viscous damping factors associated with the three flexible points are 0.1%.

3.4.6 External Sourced Translation Acceleration Limits

The translational accelerations responses from sources external to the instrument sensor unit at the spacecraft side of each instrument sensor unit mount shall not exceed the limits specified in the Externally-Sourced Translational Acceleration Bandpass Limits Table. The limits apply to each orthogonal axis after the acceleration is filtered using an eighth-order band pass Butterworth filter with -3dB frequencies at f1 and f2. Note that the filter has a fourth-order roll-off on both sides of the response. (CCR X00040)

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ID

ACXUIID111

ACXUIID112

Object Number

4.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

4 Constraints In order to ensure proper instrument performance or to prevent possible instrument damage, the following Government-approved constraints are imposed by the instrument developer on spacecraft integration and test activities, including launch, activation and operations.

No constraints have been identified at this time.

Page 14 of 16 Printed Tuesday, November 9, 2021

ID

ACXUIID113

ACXUIID114

ACXUIID115

ACXUIID116

Object Number

5.0-1

5.1

5.1.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

5 GIRD Deviations This section identifies GIRD requirements that the Government has deviated from for this instrument. Where appropriate, corresponding GIRD paragraph titles and numbers are identified in parentheses.

5.1 On-Orbit Concept

The spacecraft and ACX with associated ground processing algorithms shall meet all functional and performance requirements when stationed in geostationary orbit between 80 and 105 degrees west. (CCR X00040)

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ID

ACXUIID117

ACXUIID118

ACXUIID119

ACXUIID120

ACXUIID121

ACXUIID122

ACXUIID123

ACXUIID124

ACXUIID125

ACXUIID126

ACXUIID127

ACXUIID128

ACXUIID129

Object Number

6.0-1

6.1

6.1.0-1

6.1.0-2

6.1.0-3

6.2

6.2.0-1

6.2.0-2

6.2.0-3

6.2.0-4

6.2.0-5

6.2.0-6

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

6 Design Verification Requirements The following requirements represents only a portion of the overall system verification (i.e., contractor derived requirements are not described) that must be integrated into the total system program which verifies that the system will meet the mission requirements.

6.1 Radiated Emissions, Electric Field (RE 102)

The test procedure used for this test shall be in accordance with MIL-STD-461G, RE102.

Radiated narrow band electric field levels generated by the instrument shall not exceed the levels specified in Figure RE102-3 of MIL-STD-461G, applicable to fixed wing external.

Radiated narrow band electric field levels generated by the instrument shall not exceed the levels specified in the Radiated Emissions Notch Table. (CCR X00040)

Frequency Range (MHz)

Rationale Test Limit, dBuV/meter

1560 - 1595 GPS L1 C/A

GPS L1 C

1210.1 – 1245.1 GPS L2 C 5

1164.45 – 1188.45 GPS L5 5

2033.5-2037.5 CDAS Cmd, ORTT&C Cmd 12

6.2 Reserved (CCR X00040)

Reserved (CCR X00040)

Reserved (CCR X00040)

Reserved (CCR X00040)

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ID

ACXUIID130

ACXUIID131

Object Number

7.0-1

418-XO-ACXUIID-0072, RM Version, Geostationary Extended Observations (GeoXO) Atmospheric Composition (ACX) Unique

Instrument Interface Document (UIID)

7 Acronyms ACX Atmospheric Composition Instrument for GeoXO APID Application Process Identifier BRF Body Reference Frame C&DH Command and Data Handling CDAS Command and Data Acquisition Station CCSDS Consultative Committee for Space Data Systems EMC Electromagnetic Compatibility EPP Earth Pointing Platform FOV Field of View GeoXO Geostationary Extended Observations GIRD General Interface Requirements Document GOES Geostationary Operational Environmental Satellite GPS Global Positioning System GSFC Goddard Space Flight Center Hz Hertz ICD Interface Control Document IDD Instrument Description Document kg kilogram LOS Line of Sight m meter Mbps million bits per second NASA National Aeronautics and Space Administration ORF Orbit Reference Frame ORTT&C Orbit Raising, Tracking, Telemetry and Command S/C Spacecraft SNR Single to Noise Ratio SRS Shock Response Spectra TBD to be determined TBR to be resolved TBS to be specified UIID Unique Instrument Interface Document UV Ultraviolet W Watt

Effective Date: August 12, 2021 418-XO-ACXUIID-0072 Expiration Date: Five years from date of last signature Baseline Version 1.1 Responsible Organization: GeoXO Flight Project/Code 418

Document Change Record (DCR)

CCR GeoXO#: X00020 Rev: A Title: 418-XO-ACXUIID-0072 Baseline ACX UIID Contract # N/A GOES S/C: GeoXO Effectivity: Instruments CCB Status: Approved Doc #: 418-XO-ACXUIID-0072 CCB Date: 08/12/2021 Doc Version: 1.0 Contract Mod#: N/A DOORs Version: 1.0 Doc Change Date: Aug. 12, 2021 DOORs ID #: All

CCR GeoXO#: X00040 Title: ACX UIID: Changes for Phase A Contract # N/A GOES S/C: GeoXO Effectivity: Instruments CCB Status: Approved Doc #: 418-XO-ACXUIID-0072 CCB Date: 11/03/2021 Doc Version: 1.1 Contract Mod#: N/A DOORs Version: 1.1 Doc Change Date: Nov. 03, 2021 DOORs ID #: Modify: ACXUIID22 (1.2.0-12), 40 (3.1.4.0-2), 61 (3.3.4.0-1), 67 (3.3.6.0-

1), 68 (3.3.6.0-2), 69 (3.3.6.0-3), 74 (3.4), 81 (3.4.2.0-2), 82 (3.4.2.0-3), 84 (3.4.3.0-1), 85 (3.4.3.0-2),86 (3.4.3.0-3), 106 (3.4.6.0-4), 103 (3.4.6.0-1), 104 (3.4.6.0-2), 105 (3.4.6.0- 3), 106 (3.4.6.0-4), 122 (6.1.0-3), 123 (6.2), 124 (6.2.0-1), 125 (6.2.0-2), 126 (6.2.0-3), 127 (6.2.0-4), 128 (6.2.0-5), 129 (6.2.0-6), Add: ACXUIID133 (3.4.7), 132 (3.4.7.0-1)