Disclaimer: This material is being kept online for historical purposes. Though accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers. Visit https://espo.nasa.gov for information about our current projects.


HU-25C Guardian 09/15/15

Download PDF
Flight Number: 
OIB #1
Payload Configuration: 
Nav Data Collected: 
Total Flight Time: 
2.7 hours
Flight Segments: 
Start:09/15/15 15:05 Z Finish:09/15/15 17:50 Z
Flight Time:2.7 hours
Log Number:15F005PI:John Woods
Funding Source:Thomas Wagner - NASA - SMD - ESD Cryospheric Science
Purpose of Flight:Check
Comments:The ICF consisted of VFR flight up the VA eastern shore while ATM tuned their laser, followed by multiple passes from West-to-East at a variety of altitudes (1500, 2500, 4500, 7500, 11500, 14500, 17500) with one pass along Chincoteague Bay at each altitude. At the final altitude of 17,500’ MSL, DMS lines were flown from West-to-East and then North-to-South as orthogonal passes. All science profile requirements were met with only one repeat pass required. Data review is in progress as to its validity prior to operational deployment to Greenland. Power up sequence was accomplished by having ground DC power connected prior to aircrew show at aircraft, when APU was brought on line the batteries needed to be on to carry the load until the APU was up and running – a feature of the HU-25 is that the APU won’t start when GPU power is connected. Engine start power down of instruments was not required and power appeared to be provided seamlessly to the research system using this technique (note: AUX bus in override, research power ON, and cockpit UPS interrupt in OVERRIDE provided this capability). Upon engine shut down, the reverse was used where APU picked up the load upon engine shutdown and batteries were kept on until GPU power was connected available and switched on. The EMI/EMC consisted of operating all systems and radios to verify any interference. ADF was not able to lock on, but this is expected as part of its normal poor performance. The hand-held Iridium was tested both using its own internal antenna and the ships antenna, and ATM/DMS will review GPS accuracy data for any interference (from past experience, a filter will be brought to Greenland just in case). The HF radio transmitted on multiple frequencies, but only one received any response, which can be somewhat expected in the finicky HF environment.
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.