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16 July 2001 (Flight #1873)
Aircraft Flight Summary
Date: 16 July 2001
Time (Flight): 16:30 to 19:47 UTC
Time (Data): 16:46 to 19:24 UTC
Aircraft Type: Convair CV-580
Aircraft Flight Scientist: Prof. Peter Hobbs
Aircraft Flight Number: 1873
Mission Location: Atlantic Ocean
Lat/Lon Coverage: 35.9-37.9N, 73.9-75.7W
Navigation Statistics: versus Time
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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 7/16/2001 15:23 UTC
Images by SSEC UW-Madison
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GOES-8 Images (satellite loop)
GOES-8 7/16/2001 16:45 to 19:45 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 CERES/AVHRR retrievals under cloud-free conditions
- BRDFs at lighthouse, buoy 44014, and buoy 41001
- Underfly AVHRR satellite (at 1908 UCT) at buoy 41001
- Continous vertical profile over buoy 4100 (no height-resolved chemistry)
Accomplishments of Flight:
- Extensive cirrus clouds did not permit goals to be achieved. Also, the safety communications aircraft for CV-580, namely Proteus, had an instrument problem that required them to cut mission short. Therefore, CLAMS Control required CV-580 to cut short its transit flight to buoy 41001 and return to Wallops.
- Some runs at 100 ft between lighthouse and buoy 44014 (in intermittent cirrus)
- Did BRDF in best cloud-free area available (still some cirrus) at 35 deg 58.6 min N and 73 deg 59.68 min W. Also climbed to 10,000 ft at this location for continous sunphotometer and in situ aerosol measurements.
- Continous sunphotometer and aerosol etc measurements in profile to 100 ft on return to Wallops.
- Some filters for chemistry, but not height resolved
Weather Conditions:
Instrument Problems:
- UV up and down
- CNC -1 short of butanol, unreliable
Photographs From Aircraft Vantage
Digitized Photographs
Click photograph thumbnail to load more detailed version
17:18 Cirrus |
17:19 Window Refl. |
17:31 Hvy. Cirrus |
17:43 Haze & Cirrus |
17:57 BRDF Site |
17:58 BRDF Cirrus |
18:41 Clouds |
18:42 Cirrus |
19:08 Ocean Hotspot |
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Images by Dr. Charles Gatebe
Flight Log by Peter Hobbs
| CV-580 Flight Log |
| Time (UTC) |
Activity |
| 1630 |
Engines on |
| 1638 |
Take off |
| 1638-1640 |
Climb to 1400ft heading to CLAMS lighthouse |
| 1640-1708 |
To lighthouse at 1400 ft |
| 1708-1721 |
From lighthouse to buoy 44014 at 100 and 500 ft. |
| 1721-1728 |
Looked for cloud-free area for BRDF near buoy 44014 : unable to find |
| 1728-1734 |
Return to buoy 44014 |
| 1734-1753 |
Head to buoy 41001. Widespread cirrus. |
| 1753-1813 |
Held by CLAMS Control at 35 deg 58.6 min N/73 deg 59.68 min W because of Proteus instrument problem. Did seven turns at this location for BRDF measuremnts. Partly cloudy. |
| 1813-1844 |
Still on "hold" by Control, therefore, climbed at same location to 10, 000 ft for AOD and aerosol measurements. |
| 1844-1905 |
Started return to Wallops (as instructed by CLAMS Control) in haze layer near 9,000 ft. |
| 1905-1910 |
Started descent at 36 deg 43.68 min/75 deg 13.64 min between lighthouse and buoy 44014) for AOD and BRDF measurements beneath cloud-free region. Instructed by CLAMS Control to stop descent and return to Wallops. |
| 1910-1944 |
Proceeded to Wallops on descending path, with some runs at 100 ft, but still extensive cirrus. |
| 1944 |
Touchdown at Wallops |
| 1947 |
Engines off |
Weather Summary by Fred Rose
CREATION DATE: Monday, 16 July 2001 17:42:53 UTC
FORECAST: Scattered high clouds arriving early this morning.
GENERAL OVERVIEW: Weak surface high pressure system to the southeast. Airmass boundary to north over Pennsylvania and New York; cool dry air to the north of that boundary, warm muggy air to the south. Upper-level shortwave with clouds & showers over Kansas and Missouri.
Level-1B HDF Data Distribution Facility
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