17 July 2001 (Flight #1874)
Aircraft Flight Summary
Date: 17 July 2001
Time (Flight): 12:28 to 18:16 UTC
Time (Data): 12:44 to 17:50 UTC
Aircraft Type: Convair CV-580
Aircraft Flight Scientist: Prof. Peter Hobbs
Aircraft Flight Number: 1874
Mission Location: Atlantic Ocean
Lat/Lon Coverage: 36.5-37.9N, 74.8-76.3W
Navigation Statistics: versus Time |
Flight Track Map
Images by U.Wash.
CAR Data Summary
Principal Investigator: Dr. Michael King
Co-PI: Dr. Charles Gatebe
Spectral Bands: Configuration
Calibration Type: Final
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MODIS Image (direct broadcast)
MODIS 7/17/2001 16:05 UTC
Images by SSEC UW-Madison
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GOES-8 Images (satellite loop)
GOES-8 7/17/2001 12:45 to 18:15 UTC
Images by NASA LaRC
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CAR - (quicklook)
Imagery from CAR Instrument
(RGB = 1.04, 0.87, 0.47 microns)
Click browse image thumbnail to load more detailed version
Images by Dr. Charles Gatebe
Flight (Mission) Detail by Peter Hobbs
Goals of Flight:
To support Terra overpass of COVE lighthouse at 1614 UTC with:
- Vertical spiral 2 nm NW of lighthouse (36 deg 57.3 min/75 deg 37.5 min)
- Chemical measurements via filters and other aerosol measurements at several selected levels in L-shaped pattern
- Run at 100 ft through location given above at time of satellite overpass
- BRDF measurements at above location
- BRDF over Dismal Swamp
Accomplishments of Flight:
All goals achieved in essentially cloud-free conditions. Excellent data set. ER-2 and several other NASA aircraft stacked over lighthouse at Terra overpass. "Golden day" for comparing MODIS, MISR, and Air-MISR with airborne and ground-based measurements.
Weather Conditions:
Essentially cloudless (except for scattered cumulus over land). Moderate aerosol optical depth and light-scattering values.
Instrument Problems:
- CNC-1 (too warm)
- DMPS (because associated CN counter not working because of heat)
- Aerosol spectroreflectometer intermittent
- FSSP-300 may be reading low (compared to FSSP)
- TANS-vector altitude data lost between 1716 and 1750 UTC
Photographs From Aircraft Vantage
Digitized Photographs
Click photograph thumbnail to load more detailed version
12:03 Pilot McMillan |
12:06 Pilot Rhode |
12:58 MISR Overpass |
15:17 C.G. Aircraft |
15:17 Chesap. Lghth. |
16:03 100ft ASL |
16:10 Atlantic Ship |
16:20 Chesap. Lghth. |
16:30 Aircraft Carrier |
16:41 Lighth. BRDF |
17:29 Cumulus |
17:29 Dismal Swamp |
17:31 BRDF Site |
17:33 Swamp BRDF |
17:34 Lake Drummond |
17:35 Swamp BRDF |
17:35 Swamp BRDF |
17:47 Aircraft Carrier |
17:47 Multiple Ships |
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Images by Dr. Charles Gatebe
Flight Log by Peter Hobbs
| CV-580 Flight Log |
| Time (UTC) |
Activity |
| 1228 |
Engines on |
| 1235 |
Take off |
| 1235-1259 |
To 2 nm NE of COVE lighthouse (36 deg 57.3 min/75 deg 37.5 min), hereafter referred to as "lighthouse", at 2,000ft |
| 1259-1305 |
Descend to 100 ft over lighthouse |
| 1305-1336 |
Spiral to 11,000 ft over lighthouse |
| 1336-1425 |
Descend to 9,000 ft and level runs near this level for 1st set of chemical filters. Roughly an L-shape flight pattern east of lighthouse, with westerly portion near lighthouse |
| 1425-1430 |
Descend to 6, 000 ft |
| 1430-1512 |
Second set of filters exposed near 6,000 ft in approx same L-pattern as at 9,000 ft. |
| 1512-1517 |
Descend to 3,000 ft. |
| 1517-1549 |
Third set of filters exposed near 3,000 ft in approximately same L-pattern as at 9,000 ft and 6,000 ft |
| 1549-1601 |
Descend to 100 ft. |
| 1601-1633 |
East to west, and west to east, tracks at 100 ft, through lighthouse but with track east of lighthouse longer than track west of lighthouse. At lighthouse at 1613 UCT. Terra satellite overpass at 1614 UTC. |
| 1633-1640 |
Climb to 600 ft over lighthouse. Set up for BRDF turns |
| 1640-1704 |
Eight CAR turns for BRDF |
| 1704-1727 |
Climb to 5,500 ft over lighthouse and head to Dismal Swamp descending to 2,000 ft |
| 1727-1735 |
Three CAR turns for BRDF over Dismal Swamp (cut short by dwindling fuel). Cessna should have been overhead at 12,000 ft. Location of turns: 3 miles west of 36 deg 32 min/76 deg 23 mins |
| 1735-1812 |
Return to Wallops |
| 1812 |
Touchdown at Wallops |
| 1816 |
Engines off |
Weather Summary by John Murray
CREATION DATE: Tuesday, 17 July 2001 10:31:15 UTC
FORECAST: We expect relatively clear conditions this morning over the Cove Site and the two Buoys in the operating area. Expect primarily scattered low cloudiness early in the day and with the MIZR overflight at 1214 EDT today. Conditions will begin to degrade toward evening producing increased cloudiness at all levels on Wednesday and the potential for precipitation beginning sometime on Thursday. Once the mesoscale models begin to settle out with this new pattern, a better time estimate for the formation, movement, intensity and persistence of the MCC will be possible.
GENERAL OVERVIEW: As forecast, the upper levels are clearing in response to northward movement of the jet core. This divergence in the jet is setting up a complex pattern in the mid west that the models have yet to fully grasp. Mid to low level cloudiness that was forecast in the earlier run will probably take longer to develop than was originally forecast. This will begin as the flow pattern associated with the subtropical ridge advects begins to advect increasing low level moisture over the Ohio Valley. Once the MCC begins to establish itself sky conditions will become more obscured.
Level-1B HDF Data Distribution Facility
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