12 July 2001 (Flight #1871)
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Aircraft Flight Summary
Date: 12 July 2001
Time (Flight): 11:02 to 16:35 UTC
Time (Data): 11:18 to 16:07 UTC
Aircraft Type: Convair CV-580
Aircraft Flight Scientist: Prof. Peter Hobbs
Aircraft Flight Number: 1871
Mission Location: Atlantic Ocean
Lat/Lon Coverage: 36.8-38.4N, 73.8-75.8W
Navigation Statistics: versus Time
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Flight Track Map
Map 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 7/12/2001 15:47 UTC
Images by SSEC UW-Madison
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GOES-8 Images (satellite loop)
GOES-8 7/12/2001 11:15 to 16:15 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:
- BRDF near COVE lighthouse
- Vertical profile, with full chemistry, over lighthouse
- Low pass over lighthouse at Terra overpass time (1554 UTC)
- BRDF near lighthouse
Accomplishments of Flight:
- Done, but under partly cloudy skies
- Done, sampled for one hour at approximately 6,000 ft and 2,400 ft
- Done, but at approximately 100 ft beneath cloud-free hole well to north of lighthouse
- Not done due to extensive cirrus cloud cover
Weather Conditions:
Postfrontal conditions; low Aerosol Optical Depth. Cirrus and altocumulus clouds covering large regions of sky.
Instrument Problems:
- A few short periods of data loss (during runs at 2,400 ft) due to inverter failure
Additional Comments:
- Coordinated flight with ER-2, Proteus, and OV-10.
- Communication problems within aircraft and from air to ground (encountered on first flight) solved. Aircraft cabin air conditioner now working.
- Filter for PIXIE measurements integrated over flight
Photographs From Aircraft Vantage
Digitized Photographs
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11:24 DelMarVa Coast |
11:33 Cirrus Clouds |
11:35 Contrails & Cirrus |
11:35 Haze |
12:04 Contrails |
12:11 Contrails & Cirrus |
12:23 Ocean Color |
12:24 Ship Wake |
12:24 Ship Wake |
12:25 Cirrus Clouds |
12:30 Contrails & Cirrus |
12:31 Cirrus Clouds |
13:00 Lighthouse |
15:44 Ocean Color |
15:51 Tom Arnold |
15:51 Inst. Console |
Images by Dr. Charles Gatebe
Flight Log by Peter Hobbs
| CV-580 Flight Log |
| Time (UTC) |
Activity |
| 1102 |
Engines on |
| 1110 |
Take off |
| 1115 |
At 6,000 ft heading from Wallops to COVE lighthouse |
| 1134 |
Over lighthouse at 6,000 ft |
| 1134-1203 |
Descend at 2,000 ft/min over lighthouse |
| 1203-1217 |
Level runs for TANS "lockon" and set up for BRDF circles |
| 1217-1225 |
Four circles for BRDF measurements of ocean at 36 degrees 57.2 minutes N and 75 degrees 37.5 minutes west (about 2 nm NE of lighthouse). Cloudy. |
| 1225-1240 |
Ascend over lighthouse to 10,000 ft |
| 1240-1250 |
Descend near lighthouse at 500 ft/min to 6,000 ft |
| 1250-1348 |
Horizontal legs across wind at 6,000 ft over lighthouse for first set of filter measurements via baghouse |
| 1348-1357 |
Descend over lighthouse at 500 ft/min to 2,400 ft |
| 1357-1534 |
Horizontal legs across wind at 2,400 ft over lighthouse. During latter portion of these legs occasionally intercepted black smoke from fire on land; descended to 1,500 ft in attempt to avoid intercepting this smoke. Smoke should not have affected the ionic/carbonaceous fiters, since these came from intermittent bag house samples, but may have affected the continuous PIXIE filters and may show up on the Goddard aerosol spectroreflectometer. Other plumes from ships and land intercepted (see neph and CN measurements) at this low altitude. Couple of short computer outages during these legs. |
| 1534-1538 |
Descend to 100 ft beneath fairly large hole in cirrus. |
| 1538-1600 |
Horizontal leg at about 100 ft above ocean beneath hole in cirrus. AOD only about 0.1. Terra satellite overpass at 1554 UTC, at this time aircraft was at about 38 degrees 20.71 minutes N and 74 degrees 16.25 minutes W |
| 1600-1605 |
Climb to 2, 000 ft |
| 1605-1635 |
Return to Wallops at 2,000 ft |
| 1635 |
Touchdown |
| 1635 |
Engines off |
Weather Summary by Fred Rose
CREATION DATE: Thursday 12 July 2001 14:16:44 UTC.
FORECAST: Cool and dry with scattered high clouds. Highs in the lower 80's. Lows in the lower 60's
GENERAL OVERVIEW: Jet stream centered overhead with waves of cirrus during today. Front to the south over NC/SC border stalls out. Wave in stationary front develops Friday and begins to push front northward.
DISCUSSION: Disapointing abundant cirrus this morning should diminish in extent by noon and then increase again late in the afternoon. Tomorrow front to the south tries to push northward with increasing low level moisture and clouds especially to the south over northern North Carolina. Aerosol loading to remain low for the next two days.
Level-1B HDF Data Distribution Facility
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