NAMMA HAMSR

2006-09-09: Usual 55GHz jumps. 118 no longer seriously compressed, but one of the channels saturates when the instrument gets cold at higher altitudes.

namma_hamsr_20060909_Eng-quicklook.pdf

2006-09-03: Good flight. Usual jumps in 55 GHz gain. 118 GHz is compressed.
2006-09-04: Usual 55 GHz Jumps. Compressed 118.
2006-09-05: Usual jumps in 55GHz. 118 GHz data is compressed, and probably not usable.
2006-09-08: Usual 55GHz jumps. 118 no longer seriously compressed, but two of the channels saturate when the instrument gets cold at higher altitudes.

namma_hamsr_20060908_Eng-quicklook.pdf

namma_hamsr_20060905_Eng-quicklook.pdf

namma_hamsr_20060904_Eng-quicklook.pdf

namma_hamsr_20060903_Eng-quicklook.pdf

Data is in two files, before the MMS maneuvers and during and after. You can see the maneuvers clearly in the data. Jump in the 55 GHz apparent in the raw counts. A few bad samples or noise in the 183 GHz. Calibrated Cross track on the 118 has some odd structure.
HAMSR Engineering Quicklook

First flight with the 118 radiometer functional. 3-mil radome installed over 118/183 side after radome broke on last flight. There is some noise apparent noise in the load physical temperature readings, but no explanation for it presently.

namma_hamsr_20060830_Eng-quicklook.pdf

Good flight, but 2-mil radome on 118/183 side broke again.

namma_hamsr_20060826_Eng-quicklook.pdf

8/24/06 Repairs: Radome on 118/183 side was replaced with a 2-mil thick sheet of mylar (previously was 1-mil thick on this side). Also, a loose SMA connector was found on the output of the 183 GHz first IF LNA; it was tightened.

Very good flight. Radome survived without problems. 183 GHz noise was not present for the first time in many flights, presumable due to tightening the loose SMA connector.

Flight included a rendezvous with a British research plane for about an hour (1450-1550).

At about 1736, Ch. 7 on the 55 GHz radiometer had saturated hot counts that persisted until nearly the end of the sortie. Will fix before next flight by adding 1 dB of attenuation in that channel.

HAMSR Quicklook 2006-08-25

3rd Science flight from Sal. Radome on 118/183 side broke at approx. UT1406 and instrument and cal load temperatures were unstable thereafter.

HAMSR Quicklook 2006-08-23

2nd science flight from Sal; approx. 8 hour sortie. Sortie number 06-035. Included cloud penetration and satellite under-pass. Noise on 183 GHz channels continued during flight.

HAMSR Quicklook 2006-08-20

First Science flight from Sal. HAMSR worked OK, but noise on 183 channels started at take off and persisted until landing.

Transit flight from Grand Forks to Cape Verde. About 20 minutes into flight 183 channels started to exhibit excessive noise (this will later be determined to be caused by a loose connector on the output of the 183 GHz first IF LNA). An attempt to stabilize the receiver by cycling power was made about 5 times, but did not improve the situation.