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HU-25C Guardian 10/08/15

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Flight Number: 
OIB2015 Arctic Southwest Coastal A
Payload Configuration: 
Nav Data Collected: 
Total Flight Time: 
3.8 hours
Flight Segments: 
Start:10/08/15 10:25 Z Finish:10/08/15 14:15 Z
Flight Time:3.8 hours
Log Number:16F002PI:John Woods
Funding Source:Thomas Wagner - NASA - SMD - ESD Cryospheric Science
Purpose of Flight:Science
Comments:OIB flew its first science mission out of Kangerlussuaq today - the Southwest Coastal A flight plan. The HU-25 turned for a second flight of the day.
Flight Hour Summary: 
Flight Hours Approved in SOFRS100
Flight Hours Previously Approved 67.4
Total Used32.665.3
Total Remaining 2.1
16F002 Flight Reports
Date Flt # Purpose of Flight Duration Running Total Hours Remaining Miles Flown
10/05/15OIB2015 Arctic Sea Ice CentralScience3.63.663.8
10/05/15OIB2015 Arctic Sea Ice EastScience3.87.460
10/06/15OIB2015 Arctic Ice-Sat2 NorthScience411.456
10/07/15OIB2015 Arctic Transit Thule to KangerlussuaqTransit213.454
10/08/15OIB2015 Arctic Southwest Coastal AScience3.817.250.2
10/08/15OIB2015 Arctic Thomas-Jakobshavn 01Science3.720.946.5
10/09/15OIB2015 Arctic Umanaq BScience3.924.842.6
10/13/15OIB2015 Arctic Jakobshavn Eqip StoreScience2.927.739.7
10/13/15OIB2015 Arctic Southeast Coastal AScience3.631.336.1
10/18/15OIB2015 Arctic Southeast Coastal BScience4.135.432
10/19/15OIB2015 Arctic Helheim-KangerdlugussuaqScience3.739.128.3
10/19/15OIB2015 Arctic Helheim-Kangerdlugussuaq Gap BScience3.94324.4
10/20/15OIB2015 Arctic Jakobshavn Mop-UpScience3.746.720.7
10/20/15OIB2015 Arctic Southwest Coastal BScience3.750.417
10/21/15OIB2015 Arctic Southwest Coastal CScience3.453.813.6
10/21/15OIB2015 Arctic K-EGIG-SummitScience3.757.59.9
10/22/15OIB2015 Arctic Mopup SouthScience259.57.9
10/22/15OIB2015 Arctic Ferry BGSF-CYYRFerry2.261.75.7
10/23/15OIB2015 Arctic Ferry CYYR-KRICFerry3.3652.4
10/23/15OIB2015 Arctic Ferry CYYR-KRICFerry0.365.32.1
15F005 Flight Reports
Date Flt # Purpose of Flight Duration Running Total Hours Remaining Miles Flown
09/15/15OIB #1Check2.72.797.3
09/20/15OIB #2, 3, 4Ferry2.75.494.6
09/21/15OIB #2, 3, 4Ferry2.37.792.3
09/21/15OIB #2, 3, 4Ferry29.790.3
09/23/15OIB2015 Arctic North Central Gap 02Science3.913.686.4
09/24/15OIB2015 Arctic Northwest Coastal AScience3.717.382.7
09/25/15OIB2015 Arctic Northwest Coastal BScience3.821.178.9
09/28/15OIB2015 Arctic Sea Ice WestScience3.724.875.2
09/30/15OIB2015 Arctic North Central Gap 01Science3.928.771.3
09/30/15OIB2015 Arctic Zachariae-79NScience3.932.667.4

Flight Reports began being entered into this system as of 2012 flights. If there were flights flown under an earlier log number the flight reports are not available online.

Related Science Report: 

OIB - HU-25C Guardian 10/08/15 Science Report

Mission Summary: 

Mission: Falcon Southwest Coastal A (priority: high)

This mission is one of three (with Falcon Southwest Coastal B and C), which together refly most of the the “Southwest Coastal A and B” missions flown in Spring 2015. These three flights work together in an interlaced (working upward from the coast) manner. This particular flight concentrates on the first and fourth lowermost of the coast-parallel lines, plus two additional lines covering a southern lobe of the ice sheet.

We were fortunate with weather on this our first day of flight operations in southern Greenland, with clear skies in Kangerlussuaq and over much of the southwestern portion of the ice sheet.  We chose to fly the southwest sector first because we expected an oncoming weather system from Labrador and the Davis Strait to begin covering this area with cirrus clouds as the morning wore on.  We began flying the mission at a lower-than-usual 29,000' MSL in order to improve our chances of staying below the building cirrus layer.  The clouds we encountered in the south, however, were lower than we expected, with the bottoms often around 20,000' MSL.  So we dropped to 19,000' MSL and successfully collected data over approximately 85% of the flight line.  This approach worked for this particular mission, which is one of our shorter flights.  However, flying this low adversely affects our range and would have caused us to shorten the mission had it been a longer one, or make a fuel stop if a nearby airport were available.

All instruments performed well today.  Prior to takeoff this morning, we swapped the lens on the FLIR camera from a 45 deg field-of-view (FOV) lens to a 15 deg FOV version.  This FOV should be a better match to the swath of the ATM lidar and the DMS camera, and will also provide improved image resolution within the smaller FOV.

We conducted a ramp pass at 4000' MSL.

Data volumes:
DMS: 26.8 Gb
Narrow Swath ATM: 34 Gb
FLIR: 1.9 Gb

total data collection time: 3.7 hrs


Map of Falcon - Southwest Coastal A

Kangiata Nunaata Sermia

Southwest Greenland fjords