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Terra’s MODIS Roll #114 was completed successfully. The low fidelity times for the maneuver 42/20:45:00-22:25:16

Saturday, February 13, 2012
Lunar Roll Maneuver (-14.7483 degrees)
2012/042 21:54:16 ATC MOD_OA04_FR_NIGHT_RATE.1 (03:23 early)
2012/042 22:02:22-22:09:08 ATC MOD_OA08_ROLL_MAN.3
2012/042 22:50:18 ATC MOD_OA03_FR_DAY_RATE.2 (03:23 late)

The reflective solar bands (RSB) of Terra MODIS have experienced relatively large degradation in recent years. The current calibration algorithm used in deriving the Collection 5 LUTS does not completely capture and correct for this degradation, which is both wavelength and angle-of-incidence dependent. Science data products that utilize the shorter wavelength bands, especially Bands 8 (412 nm), 9 (443 nm) 3 (469 nm), 1 (646 nm), and 2 (856 nm) can expect to see an observable impact on data quality.

Saturday, November 05, 2011
Lunar Roll Maneuver (-2.4150 degree roll)
2011/309 17:34:04 MCL MOD_OA03_FR_DAY_RATE
2011/309 18:20:28 MCL MOD_OA03_FR_NIGHT_RATE (03:23 early)
2011/309 19:00:28-19:07:14 MOD_OA08_ROLL_MAN
2011/309 19:16:19 MCL MOD_OA03_FR_DAY_RATE (03:23 late)
2011/309 20:02:23 MCL MOD_OA03_FR_NIGHT_RATE

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Spacecraft: AM-1 Terra
Date: 2011/290 (10/17/2011)
Data Collect Begin Time: 02:23:02 GMT
Data Collect End Time: 02:29:32 GMT
Total Collect Duration: 6 minutes 30 seconds
Sun-Moon-MODIS Phase Angle: 55.31 degrees
Requested Roll Angle: -11.3417 degrees
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Spacecraft: PM-1 Aqua
Date: 2011/280 (10/07/2011)
Data Collect Begin Time: 11:19:10 GMT
Data Collect End Time: 11:25:40 GMT
Total Collect Duration: 6 minutes 30 seconds
Sun-Moon-MODIS Phase Angle: 51.35 degrees
Requested Roll Angle: -13.3063 degrees
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MODIS Characterization Support Team

MCST is dedicated to the production of a high quality MODIS calibration product. This product is a precursor to every geophysical science product. MCST works for the Science Team Leader and is responsible for developing and maintaining the calibration product (L1B algorithm).

Calibration

Collection 6 has been under development for a number of years. MCST, in consultation with representatives of the science disciplines, developed improvements to the calibration algorithms and methodolgies to handle known issues with the aging MODIS sensors. Summary talks of the proposed Collection 6 changes have been delivered at the MODIS science team meetings over the last few years.

L1B

Current L1B LUT Versions:

Terra C6: 6.1.26.40; Terra C6.1: 6.2.2.38; Aqua C6: 6.1.37.42; Aqua C6.1: 6.2.1.38