1998-05-21 (Flight #1752) |
Aircraft Flight SummaryDate: 1998-05-21 |
Flight Track Map
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Satellite Images from goes-09
1915 - 2315 UTC |
CAR - (QuickLook)
Imagery from CAR Instrument
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Flight Mission Details
Conducted BRDF measurements over a surface of both leads and sea ice, and over open ocean water - all under totally diffuse conditions. Manual gain setting test was also performed towards the end of the flight. Total of 12392 scan data were collected between 20:18:59 - 22:22:50 UTC.
Flight Path, Timing, and Measurements
On the way out of Barrow, the filterwheel channel for the CAR was locked on 1.6 µm. At 20:27, 156.78 W and 71.35 N, the CV-580 flew over many open leads. At 20:32, the CAR was locked on zenith viewing mode to scan the bottom of a higher stratus cloud layer. At 20:40, the CAR was changed to nadir viewing mode to scan lower stratocumulus.
BRDF measurements over leads/sea ice began at 20:59 (count 4194), filterwheel channel was on 1.64 µm. At 21:10 (count 5290), switched to 2.2 µm and BRDF measurements continued. At 21:25 (count 6813), BRDF measurements over leads/sea ice completed.
We then headed out to sea for more BRDF measurements. This set of BRDF measurements were taken over open ocean water . At 21:30 (count 7286), we began BRDF measurements over the open water and the filterwheel channel was on 2.2 µm. At 21:40 (count 8306), filterwheel was changed to 1.6 µm. Then the CV-580 was banked to the left to make a couple sky radiance measurements.
Generally speaking, we encountered two layers of clouds. The base of the lower cloud layer was located at 900 ft and its top at 2400 ft. The upper layer cloud was at about 3500 ft.
At 22:01 (count 10444), conducted manual gain setting testing with CAR door closed. The gain setting was cycled from 1 at scan count 10627 all the way to gain setting 8 at scan count 11520.
Note: CAR gyro readings are incorrect because of a broken wire. GPS navigational information is sometimes corrupted while on its way to the CAR data stream (residual byte stayed behind in the FIFO buffer).
