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Analysis of SOFIE Signal Changes Due to FOV Drift with Spacecraft Pointing

The study evaluates the impact of spacecraft pointing on signal changes in SOFIE measurements and provides an in-depth analysis of the error sources affecting the corrected signal. The performance of SOFIE meets Level 1 science requirements with regards to horizontal and temporal resolutions. A simulation on H2O retrieval is also presented, focusing on retrievals under cloud cover.

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Analysis of SOFIE Signal Changes Due to FOV Drift with Spacecraft Pointing

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  1. SOFIE signal changes due to FOV drift using spacecraft pointing reduces SNR margins *Lockdown was moved within a radius of 2.5 arcmin and the signal change for 12 arcsec drift (over 10 / seconds / 25 km) was calculated. Numbers shown are the worst case for all possible lockdowns. Note: the drift induced dV signal uncertainty is the error in the corrected signal considering a regression to the signal change vs FOV drift, the measurement noise (from calibration), and the pointing error (from calibration). This analysis captures all of the errors and is our CBE.

  2. Predicted SOFIE performance meets or exceeds Level 1 science requirements Horizontal and temporal resolution requirements are met *This measurement is not an AIM Level 1 science requirement

  3. SOFIE H2O retrieval simulation Retrievals in the presence of clouds

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