P-3 Orion - WFF 05/15/19

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Flight Number: 
2019 OIB Science Flight #23
Payload Configuration: 
Operation IceBridge
Nav Data Collected: 
Total Flight Time: 
8.3 hours
Flight Segments: 
Start:05/15/19 10:20 Z Finish:05/15/19 18:35 Z
Flight Time:8.3 hours
Log Number:19P017PI:Joseph MacGregor
Funding Source:Bruce Tagg - NASA - SMD - ESD Airborne Science Program
Purpose of Flight:Science
Flight Hour Summary: 
Flight Hours Approved in SOFRS250
Total Used216.3
Total Remaining33.7
19P017 Flight Reports
Date Flt # Purpose of Flight Duration Running Total Hours Remaining Miles Flown
03/26/19#2053: 2019 OIB ATFCheck0.90.9249.10
03/27/19#2059: 2019 OIB PTF-LaserCheck2.33.2246.80
03/28/19#2061: 2019 OIB PTF-RadarCheck3.26.4243.60
04/01/19#2068: 2019 OIB WFF-BGTL Transit FlightTransit6.913.3236.72458
04/03/19#2070: 2019 OIB Science Flight #1Science7.620.9229.11938
04/05/19#2072: 2019 OIB Science Flight #2Science7.728.6221.41910
04/06/19#2073: 2019 OIB Science Flight #3Science7.235.8214.22000
04/08/19#2075: 2019 OIB Science Flight #4Science6.942.7207.31780
04/09/19#2076: 2019 OIB Science Flight #5Science7.850.5199.52045
04/10/19#2081: 2019 OIB Science Flight #6Science10.160.6189.42702
04/11/19#2082: BGSF-BGTL TransitTransit2.262.8187.2696
04/12/19#2083: 2019 OIB Science Flight #7Science7.2701802109
04/15/19#2086: 2019 OIB Science Flight #8Science4.874.8175.21243
04/16/19#2087: 2019 OIB Science Flight #9Science7.682.4167.62036
04/17/19#2088: 2019 OIB Science Flight #10Science7.790.1159.91937
04/18/19#2090: 2019 OIB Science Flight #11Science7.897.9152.12008
04/19/19#2091: 2019 OIB Science Flight #12Science7.6105.5144.52104
04/20/19#2092: 2019 OIB Science Flight #13Science6.9112.4137.60
04/22/19#2094: 2019 OIB Science Flight #14Science6.61191311867
04/23/19#2099: 2019 OIB Science Flight #15Science7.7126.7123.31979
04/25/19#2102: 2019 OIB BGTL-KBGR Transit FlightTransit6.2132.9117.10
04/26/19 KBGR to BGSF TransitTransit5.7138.6111.40
05/05/192019 OIB Science Flight #16Science7.8146.4103.60
05/06/192019 OIB Science Flight #17Science8.4154.895.20
05/07/192019 OIB Science Flight #18Science8.5163.386.70
05/08/192019 OIB Science Flight #19Science8171.378.70
05/12/192019 OIB Science Flight #20Science9180.369.70
05/13/192019 OIB Science Flight #21Science7187.362.70
05/14/192019 OIB Science Flight #22Science7.9195.254.80
05/15/192019 OIB Science Flight #23Science8.3203.546.50
05/16/192019 OIB Science Flight #24Science6.3209.840.20
05/17/192019 OIB Transit Transit6.2216340
05/17/192019 OIB Transit Transit0.3216.333.70

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 - P-3 Orion - WFF 05/15/19 Science Report

Mission Summary: 

Mission: Jakobshavn 02 augmented (priority:high)

This mission is a repeat of similar 2009, 2010, 2011, 2012, 2013 and 2014 OIB flights. The primary science objectives are to (a) complete the basic Jakobshavn grid, specifically the east-west lines, and (b) repeat longitudinal surveys of the Rink and Kangerdlugssup Glaciers. We also occupy a line connecting Swiss Camp and a pair of Eric Lutz-requested points nearby. Finally we fly the main Jakobshavn centerline twice.  For 2019 we replace ICESat-1 line 0085 with ICESat-2 line A0727, which is occupied by the spacecraft on 15 May 2019.  Since this mission was a short one at 6 hrs and we had no particular time limitations today, we augmented it with two pairs of IceSat-2 ground tracks (left and right strong beams, 1L and 3L) of relatively low latency over the Umanaq Peninsula and Disko Island.  These lines were borrowed from, or are similar to, lines in the "IceSat-2 Disko-Umanaq" mission, and are intended to aid in tuning and improving geolocation for IceSat-2.

This morning's weather satellite images presented a grim spectacle at first glance, with almost all of southern and central Greenland clouded.  However, we knew from multiple weather models and from surface observations that low-level winds along the west-central flank of the ice sheet were southeasterly, and therefore blowing downhill (katabatic winds).  From this we could confidently predict that there were no low clouds beneath the abundant high clouds over the Jakobshavn basin and surrounding areas.  Clouds rarely blow downhill, thanks to the Ideal Gas Law.  This was indeed the case for our entire flightline today - we observed only medium- and high-level clouds.  We experienced only occasional light turbulence, since the katabatics were considerably weaker than yesterday.

Headwall SWIR did not operate today, but otherwise all instruments performed well. As expected, ATM experienced challenges on some of the IceSat-2 geolocation lines over Umanaq Peninsula and Disko Island.  The steep terrain under some of those lines made it impossible for us maintain a constant AGL altitude, and the surface was often alternately snow covered (bright) and bare rock (dark).  These conditions yielded an unusually large dynamic range for the laser returns, which could not always be tracked - primarily because the ATM design is optimized for ice/snow.  ATM estimates 100% altimetry data recovery over ice today, and perhaps 50% over the Disko and Umanaq lines.  We performed a ramp pass at 3000' prior to landing.

IceSat-2 RGT latencies (+/- indicates OIB surveyed after/before IceSat-2)
            0658   +4 days
            0643   +5 days
            0529   +13 days
            0727   -3 hours
OIB reached a milestone today, breaking 10,000 nm of IceSat-2 reference ground tracks flown.  We have now flown 10,090 nautical miles (18,687 km) of IceSat-2 ground tracks so far this season.

Data volumes:
ATM: 141 Gb
CAMBOT: 265 Gb
FLIR: 17 Gb
KT19: 13 Mb
MCoRDS: 2.28 Tb
Narrow Swath ATM: 192 Gb green
Narrow Swath ATM: 152 Gb IR
VNIR 63 Gb
Snow Radar: 1.57 Tb

total data collection time: 7.9 hrs