Amendment 3 Continuation Pages 5.20.21.pdf
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- Attached to
- GEO-XO Sounder (GXS) Instrument
- Solicitation number
- 80GSFC21R0027
About this file
This document provides details on a solicitation for the GEO-XO Sounder (GXS) Instrument Phase A Study. The solicitation is issued by the National Aeronautics and Space Administration Goddard Space Flight Center to obtain definition-phase study proposals for an infrared sounding instrument planned to fly on the National Oceanic and Atmospheric Administration's GEO-XO series of geostationary satellites, with the first launch in 2032. The competitive procurement will result in awards of up to two firm fixed-price contracts not to exceed $8 million each, with a 20-month period of performance. Final reports are due 12 months after award, with risk mitigation and technology development reports at 20 months. Proposed amendments to the statement of work and performance requirements document are provided. The anticipated contract award date is August 2021, with proposals due no later than June 3, 2021.
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Text version
80GSFC21R0027
Amendment Number 3
1. Attachment A, Statement of Work is hereby revised as follows:
FROM:
GXSSOW43 2.2.0-2 The Contractor shall provide a quantitative comparison of the sounder Performance against the performance requirements in
Section 03 of the PORD. (CDRL 7)
TO:
GXSSOW43 2.2.0-2 The Contractor shall provide a quantitative comparison of the sounder Performance against the performance requirements in
Section 3.2 of the PORD. (CDRL 7)
2. Attachment B, Performance Operations Requirement Document is hereby revised as follows:
FROM:
GXSPORD174 3.2.6.3.1.0-1 The GXS absolute radiometric accuracy is the unknown bias error in the measured radiance in each spectral channel, root-mean-squared with any random precision or repeatability component in a specific measurement period. It is specified in terms of a brightness temperature error at 300 K for emissive bands.
For all emissive channels, the GXS absolute accuracy shall be less than or equal to 1K or the derived NEdT, whichever is greater.
Rationale: Using the definition above, the GXS absolute accuracy is constrained to be less than 1 K or the noise level to avoid limiting impact to higher level products
TO:
GXSPORD174 3.2.6.3.1.0-1 The GXS absolute radiometric accuracy is the unknown bias error in the measured radiance in each spectral channel, root-mean-squared with any random precision or repeatability component in a specific measurement period. It is specified in terms of a brightness temperature error at 300 K for emissive bands.
For all emissive channels, the GXS absolute accuracy shall be less than or equal to 1K or the derived NEdT, whichever is greater.
Absolute accuracy values presented are 3-sigma.
80GSFC21R0027
Amendment Number 3
Rationale: Using the definition above, the GXS absolute accuracy is constrained to be less than 1 K or the noise level to avoid limiting impact to higher level products.
-End of Amendment 3-
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