Data: Clams 2001 Flight #1875

2001-07-23 (Flight #1875)

Aircraft Flight Summary

Date: 2001-07-23
Flight Time: 13:51 to 16:46 UTC
Data Time: 14:08 to 16:27 UTC
Aircraft Type: Convair CV-580
Flight Scientist: Prof. Peter Hobbs
Flight Number: 1875
Mission Location: Atlantic Ocean
Lat/Lon Coverage: 37.7-38.3N, 73.7-75.4W

Flight Track Map

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Satellite Image

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Satellite Images from GOES-8

GOES-8 satellite loop for flight number 1875

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Flight Direction	Flight Direction

Flight Mission Details

By Peter Hobbs

Goals of Flight:

- Underfly Terra satellite overpass at 1535 UTC in cloud free or scattered cloud conditions at least 50 miles from shore.
- BRDF under cloud-free conditions at ("near-Delaware") buoy 44009 at 38 deg 27.8 min /74 deg 42.12 min

Accomplishments of Flight:

- Goal #1 done: Runs from SW to NE at 100 ft in cloud free region about 70 miles east of Wallops before, during and after Terra overpass at 1535 UTC. Low aerosol optical depths (about 0.05).
- Goal #2 not accomplished due to clouds over buoy.
- Six turns for BRDF measurements at 600 ft over ocean at SW point of 100 ft runs (done just prior to low-level runs).

Weather Conditions:

- Building cumulus over land. Broken cloud over ocean with large cloud-free regions east of Wallops.

Instrument Problems:

- CNC-2

Flight Path, Timing, and Measurements

1351: Engines on

1402: Take off

1402-1500: Transit toward northeast climbing to 3200 ft and then southeast and east looking for cloud-free region.

1500-1517: Six circles for BRDF measurements at 600 ft over calm ocean in cloud-free region. Circles at SW point of 100 ft runs that followed.

1517-1520: Descend to 100 ft

1520-1554: Runs about 25 miles long at 100 ft above ocean in SW-NE direction about 70 miles east of Wallops in cloud-free region. Low AOD, 0.04-0.06. Terra satellite overpass at 1535 UTC.

1554-1614: Climb to 10,000 ft at 1,000 ft/min in cloud-free region. Good water vapor profile.

1614-1639: Return to Wallops descending steadily en route from 10, 000 ft.

1639: Touchdown at Wallops

1646: Engines off

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