The AIM spacecraft had another smooth week of
operations. All systems continue to operate nominally. The
operations team continued developing, reviewing, testing,
and loading the Relative Time-tagged Sequences to improve
spacecraft autonomous operations. We had several longer than
normal periods of uplink receiver bitlock. On Wednesday, April
9th, we had two long periods totaling 12 hours.
The SOFIE instrument
is working perfectly and autonomously. 100% of science measurements
are being transmitted and ingested into the SOFIE data system.
Level 2 data is now released through March and level 1 data
through April 8.
One operational change is scheduled. A slight
reduction in the sun senor sample dwell time is planned for
CMOS pixels used in center multi-pixel sums measurements.
This will improve the linearity of those measurements and
reduce the uncertainty in transmission profiles obtained from
those measurements. Those transmission profiles are part of
the solar edge model used to infer refraction angle. This
dwell time change will also enable the sun sensor measurements
to be used for accurate ozone retrievals in the stratosphere,
a product of opportunity, not part of the original SOFIE science.
to provide excellent science data from all four cameras. Further,
our analysis of on-orbit calibration data shows that camera
sensitivity has changed less than 0.5% since launch. CIPS
data sequencing automatically switched from the Southern to
Northern Hemisphere on the first day of spring, as planned
on and collecting dust impact data following the completion
of the Recovery ATS. Temperatures and voltages are nominal.
CDE Version 2 data processing is being implemented for Levels
1 (Charge) and 2 (Mass).