Helo albedo flight of 16 July 1998
Sky conditions were CO-SDNVSky was very uniform, though low ceiling precluded
multiple passes at different altitudes.
Intercalibration on the helo deck: scans 0 - 4
Scan 5 was a test in the air
GPS: Lat. Long. Heading
SHIP 0.7 nm south of point A
A 78o 09.8N 166o 05.3W 90 The pattern was a box 3 nm on each side
B 78o 09.8N 165o 50.3W 0
C 78o 12.8N 165o 50.3W 270
D 78o 12.8N 166o 05.3W 180
First did the albedo line at 100 feet and 30 kt sampling as fast as possible.
We traveled from 0 to 200. Scans 6 -18
Next did a box pattern (Specified above)
Altitude was 100 feet, speed 60 kt, scan rate every 10 seconds
Leg 1: east : scans 19-37
Leg 2: north: scans 38-50
Leg 3: west: 51-64
Leg 4: south 65-83 - this went over Seattle and Quebec at the end
Continued heading south
Scans 84-94 Over big lead sampled as rapidly as
possible to get lead values for calibration
Take minimum value and set equal to 0.1 to provide a check on intercalibration
while in the air
Scans 95, 96, 97
Further south every 10 sec
Scans 98-103
Went out to the middle of the albedo line and sampled going up in altitude
103 15
104 30
105 60
106 80
107 90
108 120
109 150
110 180
111 210
112 240
113 270 in fog
Intercalibration on the flight deck upward-looking on helo, downward looking
held upwards off to the side
Scans 104-120
TCG Notes:
Uniform overcasst solar disk not visible Tsurf = 0oC; surface is melting
14:04:30 Takeoff
4:56 VCR On
8:13 Poly 1 on line at point A Airspeed 75 kt Helo is in a cloud - the
surface is slightly obscured by clouds
11:13 turn beginning at B
11:34 turn end
13:44 turn beginning at C
14:07 turn end
16:27 turn beginning at D
16:46 turn end
19:47 back at point A
21:34 Over leads
21:47 end of lead
14:22:22 Poly 1 turned off
Vertical profile
14:25:54 elevation 30' start poly 1
14:26:20 elevation 60'
14:26:33 elevation 90'
14:26:46 elevation 120'
14:27:12 elevation 150'
14:27:26 elevation 180'
14:27:38 elevation 210'
14:27:50 elevation 240'
14:28:04 elevation 270'
14:28:28 Poly 1 off
Time taken here to take some site photos
14:33:52 Helo landed on ship
Downlooking video pretty bad here- flew the backup camera, but it also
apparently has tracking problems now
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