TacRL-4 MRD DRAFT.docx

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Tactically Responsive Launch (TacRL) – 4

Mission Requirements Document

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Basic: [INSERT DATE]

REVISION HISTORY

Table of Contents

INTRODUCTION

MISSION OBJECTIVES and OVERVIEW This document provides the mission requirements for the Small Rocket Program – Orbital (SRP-O) Contract launch of the Tactically Responsive Launch (TacRL)-4 space vehicles (SVs). TacRL-4 is a space mission being sponsored by the US Air Force (USAF) Space and Missile Systems Center (SMC) Special Programs Directorate (SP). The USAF SMC Launch Enterprise Core Directorate (SMC/ECL), Small Launch and Targets Division (SMC/ECLX) (also known as the Rocket Systems Launch Program (RSLP) office), will provide the Launch Vehicle (LV) and launch services for the TacRL-4 mission through the SRP-O contract, executed by the SRP-O Launch Services Contractor (LSC). SMC/SP will be responsible for coordination of the Space Vehicle (SV) activities.

This will be an SRP-O Mission Assurance Category 1 mission as defined in the SRP-O Performance-based Work Statement (PWS).

The Initial Launch capability (ILC) for TacRL-4 will be No Earlier Than 28 February 2023.

The baseline launch location for this mission will be proposed by the LSC.

The Launch vehicle will place the TacRL-4 SVs into a 450 km altitude orbit, as defined in Section 3.1, with a sun synchronous inclination. The SVs will separate from the LV via 11.732-inch Motorized Lightband [TBD] separation systems.

The purpose of the TacRL-4 mission is to demonstrate aspects of the Tactically Responsive Launch paradigm.

SCOPE

The purpose of this document is to serve as the controlling source and authority for the TacRL-4 mission specific requirements. In addition to specifying mission requirements, this Mission Requirements Document (MRD) will:

a. Identify roles and responsibilities and interfaces among the various contractors and Government agencies supporting the mission.

b. Document data provided by the agencies furnishing the SV to be used by the Launch Services Contractor (LSC) in developing the LV configuration, integrating the SV, targeting the LV, processing the flight hardware, and conducting the mission.

c. Identify constraints and environments the LSC must meet.

d. Define mission specific TacRL-4 requirements.

The MRD will be maintained by SMC/ECLX. In many cases, the detailed requirements and data will be specified in other documentation, which will be referenced herein. This includes documents such as the SRP-O PWS, LV/SV Interface Control Document (LV/SV ICD), and range safety documentation.

In the case of conflict between any of the documents referenced herein, the final signed LV/SV ICD document shall take precedence. [MRD 001]

ROLES AND RESPONSIBILITIES

The roles and responsibilities among agencies and contractors that will support the TacRL-4 missions are described below.

Customer: The RSLP Customer provides the SV(s). The Customer may be led by one or more Space Vehicle Program Offices (SVPOs) and/or Space Vehicle Contractors (SVCs) that are responsible for manufacturing and testing of the SV(s) and supporting SV to LV integration. The Customer will be the interface between SMC/ECLX and the SVPO and SVC and will provide direction to SMC/ECLX as needed. The Customer’s activities and responsibilities include:

Participation in program management Provision of SV Range Safety documentation at the request of SMC/ECLX Provision of SV data necessary to support the launch services contractor to design the desired mission Shipping the SV(s) to the launch site All SV integration activities prior to integrated operations (unless otherwise stated herein) SMC/ECLX: The RSLP office, operated by the SMC/ECLX, located at Kirtland Air Force Base, New Mexico, is responsible for SRP-O launch systems and launch operations. Its activities and responsibilities include:

Participation in program management (lead for launch segment) Range support LV integration SV interface and mating Mission Assurance Contractor (MAC): A MAC, under contract to SMC/ECLX, will provide Mission Assurance (MA) and Independent Verification and Validation (IV&V) support for the LV. Higher-level risks identified by the MAC will be sent to the Customer in monthly status updates provided by the SMC/ECLX Mission Manager (MM), and overall risk assessments of the program will be presented by the MAC in design reviews and readiness reviews.

Launch Services Contractor (LSC): The LSC is responsible for ensuring the Customer’s SV(s) reaches the designated orbit. The LSC will provide all launch solution hardware and software, integration, processing, facilities, and range coordination required to accomplish the spacelift mission. The LSC will also provide insight to the SMC/ECLX customer and other mission stakeholders on the technical solution, engineering and management processes, and status, as required by the SRP-O PWS, Contract Data Requirements List (CDRL), and other standards, terms, and conditions levied by the contract.

The LSC will ensure that Associate Contractor Agreements (ACAs) or Non-Disclosure Agreements (NDAs) are completed for the following, per PWS 1.6.1 and 1.6.2:

· ASRC Space and Defense (AS&D)

· Engility Inc.

· Tecolote Research, Inc

· Aero Thermo Technology, Inc

· Linquist

· The Aerospace Corporation Launch Service provisions launch service enhancements overview The MRD requirements are identified with standard numbers used for RSLP missions, as listed in Section 6. The requirements listed in the table below are considered enhancements, or non-standard options for RSLP launches. The LSC will include the following enhanced capabilities with requirement details described in sections below:

Required

[TBD]

Mission specific additional performance capabilities will be detailed in the LV/SV ICD.

government furnished property Government furnished property (GFP) will not be provided for SRP-O missions.

space vehicle requirements Launch and orbit Orbital Parameters The LSC shall launch the TacRL-4 mission as a Dedicated or Primary launch service. [MRD 002] A dedicated launch service is one in which the Government reserves all capacity of the launch solution. A Primary launch service is one in which the SRP-O launch service directs the launch date and orbit, with Other Government Agency (OGA) Rideshare SV(s) and/or Commercial Rideshare SV(s) allowed to utilize excess performance capacity.

The LSC shall launch the TacRL-4 mission from the LSC proposed baseline location. [MRD 003]

The LSC shall place the TacRL-4 SVs into an insertion orbit as defined in Table 3-1. [MRD 004]

Table 31: Insertion Orbit Parameters

Orbital Injection Conditions The LSC shall separate the TacRL-4 SVs with the LV pointing and angular rates as defined in the LV/SV ICD. [MRD 005] Separation System Conditions The SVs’ separation systems will have the characteristics as defined in the LV/SV ICD.

Space vehicle The integrated payload stack (IPS) consists of all TacRL-4 SVs and flight integration hardware, such as separation systems and adapters.

SV Configuration The LSC shall accommodate the volume of the TacRL-4 SVs, which consists of two identical 75 kg SVs each with an approximately 27U volume (34 cm x 35 cm x 36 cm). [MRD 008] Mechanical Interface The LSC shall provide a non-separating structural mechanical interface between the TacRL-4 SVs and the LV as defined in the LV/SV ICD. [MRD 009]

[Enhancement] The LSC shall provide a system that allows for more than one payload to be carried simultaneously and independently deployed. [MRD 010]

The LSC shall provide a payload fairing (PLF) configuration that accommodates the TacRL-4 SVs dynamic envelope. [MRD 011]

The LSC shall support the TacRL-4 SVs with a minimum fundamental frequency as defined in the LV/SV ICD. [MRD 012]

The Government will provide the separation systems for the TacRL-4 SVs, per Section 3.1.3.

SV Mass Properties The LSC shall accommodate TacRL-4 SVs with the mass properties described in Table 3-2 below and in the LV/SV ICD. [MRD 018]

Table 32: SVs Mass Properties1

1. Applies to each SV SVs Electrical Interface The LSC shall provide primary and redundant separation signals to actuate each of the TacRL-4 SV separation systems. [MRD 019]

The LSC shall detect a positive indication of each SV separation through a minimum of two loopbacks per SV separation event. [MRD 020] SV Environments Dynamics The LSC shall not exceed the dynamic environments described in NASA General Environmental Verification Standard (GSFC-STD-7000) [TBD]. [MRD 027] Thermal (Temperature and Humidity) During ground processing, encapsulation, transport, and on-pad prior to launch, the LSC shall control the internal PLF temperature between 60 to 85 °F, neglecting internal heating sources from the payload. [MRD 030] For air-based launch solutions, launch refers to separation of the LV from the air-based platform.

During ground processing, encapsulation, transport, and on-pad prior to launch, the LSC shall control the internal PLF relative humidity to ensure that condensation does not form on any internal LV or fairing surface. [MRD 031] For air-based launch solutions, launch refers to separation of the LV from the air-based platform.)

The LSC shall provide aero-thermal protection to the payload prior to launch and during ascent. [MRD 032]

The LSC shall ensure that conductive insulation is grounded and interconnected to prevent electrical discharge. [MRD 033]

The LSC shall ensure that the internal fairing wall temperature is limited to 200 °F in the cylindrical portion during ascent. [MRD 034]

The LSC shall ensure that the payload fairing is retained until aero-heating rates are below 1135 W/m2 (0.1 BTU/ft2/sec). [MRD 035]

[Enhancement] The LSC shall provide conditioned air to the payload after encapsulation through launch to maintain temperature requirements described above. [MRD 036] During certain transitions, interruptions are allowed and will be specified by the LSC in the LV/SV ICD.

The LSC shall accommodate a maximum post-encapsulation power dissipation of [TBD] W from each of the TacRL-4 SVs. [MRD 037] Contamination The LSC shall maintain the TacRL-4 SVs in a Class 100,000 environment at all times with no condensation forming on payload surfaces, as defined in ISO Standard 14644. [MRD 038]

The LSC shall ensure that inner surfaces of the fairing and payload deck are cleaned so that they are Visibly Clean when inspected with normal vision 24-48 inches from the surface with 50-foot candle luminance on the surface. [MRD 039]

The LSC shall minimize plume effects from all propulsion sources in terms of forces and moments applied to the SVs after deployment and contamination prior to and after deployment. [MRD 048]

The LSC shall perform Collision/Contamination Avoidance Maneuvers (C/CAM) as necessary to minimize payload contamination and preclude re-contact between the deployed payloads or other objects and the launch vehicle. [MRD 049] Radio Frequency (RF) / Electromagnetic Interference (EMI) / Electromagnetic Compatibility (EMC) The LSC shall minimize radiated and conducted emissions that could affect the TacRL-4 SVs. [MRD 050]

The LSC shall not exceed radiated and conducted emissions that are specified in the LV User’s Guide and specific levels will be documented in the LV/SV ICD. [MRD 051]

The LSC shall be capable of operating at the mission launch site without adverse effects from the electromagnetic environment. [MRD 052]

The LSC shall be capable of withstanding EMI radiated and conducted emissions from the SVs. [MRD 054]

Specific limitations imposed on the SVs are [TBS] by the LSC and will be documented in the LV/SV ICD.

The LSC shall be compatible with SV transmitter turn-on [TBD] seconds after each SV separation. [MRD 055] Safety The LSC shall ensure the LV and associated components will re-enter the earth’s atmosphere within 25 years after end of mission or enter an acceptable disposal orbit, as specified in AFI 91-202, the US Air Force Mishap Prevention Program. [MRD 056] The LSC shall provide a command destruct system, radar aiding transponder, and any hardware and/or modifications required for compliance with the applicable Range Safety requirements. [MRD 057] The LSC shall include a GPS range safety tracking system capable of providing sufficient LV status data for Range Safety. [MRD 058] elemetry and Instrumentation The LSC shall collect and transmit sufficient data during prelaunch and in-flight to assess LV and payload status, performance, environments, meet all Range Safety requirements and to provide diagnostics in the event of anomalous performance. [MRD 061] The LSC shall provide pulse-code modulation (PCM) telemetry with bit rate of at least 1.5 Mbps. [MRD 062] The LSC shall ensure that the telemetry system will use and provide flexibility in allocating channel bandwidths. [MRD 063] The LSC shall ensure that the telemetry system will include the capability of storing and delaying transmission of telemetry data, if required, due to availability and location of receiving stations. [MRD 064] The LSC shall ensure that the telemetry system will provide navigation, attitude, environment data, and separation confirmation of the TacRL-4 SVs, unless otherwise specified. [MRD 065] Facilities The LSC shall provide all support equipment required to process, integrate, handle, check-out, and launch the LV. [MRD 068] The LSC shall provide the launch facilities for the LV. [MRD 069] [Enhancement] The LSC shall provide the TacRL-4 SVs payload processing facility (PPF) and SV/LV integration and encapsulation facility. [MRD 070] Security The LSC shall provide the TacRL-4 SVs and/or associated SV COMSEC equipment adequate storage at the appropriate classification level or provide 24/7 access for security oversight of the SVs prior to and after integration with the LV. [MRD 072] The TacRL-4 SVs are Controlled Unclassified Information (CUI). The LSC shall support integration and encapsulation of the IPS at the CUI classification level with appropriately cleared personnel at the payload processing facility. [MRD 073] The LSC shall provide the necessary security provisions at the CUI classification level whenever post-encapsulation access inside the fairing to the SVs is needed. [MRD 074] SV COMSEC requirements will be identified in the SV-LV ICD.

Additional security guidance will be provided as required.

ACRONYM LIST

REFERENCES

MRD REQUIREMENTS LIST

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