1998-06-07 (Flight #1763) |
Aircraft Flight SummaryDate: 1998-06-07 |
Flight Track Map
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1830-2345 UTC |
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Flight Mission Details
Flight over the SHEBA site, for straight line paths and BRDF measurements; temporary fix for the noise problem may have been indentified.
Flight Path, Timing, and Measurements
Weather at Barrow on take-off was clear and cool. On the flight out to the SHEBA site cloud increased and haze layers were evident. The highlight of this section of the flight was the frontal passage at 20:06 UTC (scan 5494).
At 20:48 UTC we arrived at the SHEBA site. There were multiple cloud layers over the ship; altocumulus 18200-19000 ft, variable cloud layers to 1600-8200 ft . At scan 11795 we started straight line flight paths over the ship at about 800 ft . After this we performed a BRDF measurement in the vicinity of the ship. Skies were uniformly overcast and the surface was ice covered with some large leads. The roll angle was observed to vary between about 12 and 25 °.
TABLE
TABLE
Testing during the flight appeared to show that the noise previously noted using the automatic filterwheel was suppressed when the heater was used. This was noted during the initial descent over the SHEBA site, when condensation was indicated on the mirror. The heater was activated, and left on for some time. During a test of the filter wheel no noise appeared. Upon switching the heater off the noise reappeared. This worked successfully several times.
At 22:46 UTC a power outage required a change of tape. On return to the Barrow area a new tape was loaded (flt-1763B) and some tracks were taken over the ARM site. There were, however, few level tracks over the ARM site. After a few tracks over the ARM site the flight ended.
