OIB - P-3 Orion - WFF 04/08/19 Science Report

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Date: 
Monday, April 8, 2019
Mission: 
OIB
Mission Location: 
ICESat-2 Arctic Ocean #1
Mission Summary: 

Mission: ICESat-2 Arctic Ocean #1 (racetrack)
Priority: Baseline
 
This new flight for 2019 flies a racetrack along a single ICESat-2 ground track, selected and timed so that our aircraft and the spacecraft fly the track as closely as possible in time, and also with the track drift-corrected according to winds measured from the aircraft. The particulars of the technique we will use to fly the track will depend on knowledge of ICESat-2’s pointing accuracy just prior to the time of this flight. Options include out-and-back along the same or parallel and offset lines, varying the altitude of one or both lines, or even a four-segment line. The general idea is to obtain a composite swath wide enough to capture any likely pointing offset of the spacecraft. See Appendix D of the flight plans document for more details on the design of these flights.
 
Having increased over the past week our confidence in our ability to forecast conditions northwest of Ellesmere Island, where most zero-latency ICESat-2 tracks are to be found at the present time during our flight window but lacking near-contemporaneous imagery, we opted for this critical baseline mission. Today was also an exciting day because the GPS week rolled over from 2047 to a new integer multiple of 1024 to 2048, which runs the risk of some Y2K-like symptoms because the GPS string only uses 10 bits to provide the least significant digits of the GPS week, with the rest left to software. This event that has not occurred since 1999 and caused some oddities in our displays. We will be pre-processing our data tonight to verify that no GPS data were impacted. During our transit, Ellesmere and Axel Heiberg islands were clouded over, as predicted, but cleared as we descended off the coast and in between two smaller islands. Few leads were observed as we surveyed ICESat-2 beams 1L and 2L three times each, with only minimal haze occasionally observed. Headwall VNIR and SWIR channels experienced brief freezes, and one Applanix IMU failed. Otherwise, all instruments performed well and ATM reports 100% laser altimetry data collection. Due to the higher survey AGL (3500 ft) to achieve overlapping ATM T6 (wide-scan) swath, snow radar was operated at 2-8 GHz. We conducted two x-chats with students from South Africa and Kentucky and finally we conducted a ramp pass at 1000 ft AGL.
 
ICESat-2 reference ground track (RGT) / latency (minutes, positive/negative = ICESat-2 orbits after/before our flight)
157 / 0
 
Attached images/files:

  1. Map of today’s mission (John Sonntag / NASA)
  2. KML of today’s mission (John Sonntag / NASA)
  3. Pressure ridge origination of multiple snow drifts (Jeremy Harbeck / NASA)
  4. One of the very few leads we observed today (Jeremy Harbeck / NASA)
  5. Multi-year ice floe (Jeremy Harbeck / NASA)
  6. CAMBOT image at time of direct ICESat-2 underflight (Jeremy Harbeck / NASA)
Images: 

Pressure ridge origination of multiple snow drifts

One of the very few leads we observed today

CAMBOT image at time of direct ICESat-2 underflight

Related Flight Report: 

P-3 Orion - WFF 04/08/19

Flight Number: 
#2075: 2019 OIB Science Flight #4
Payload Configuration: 
Operation IceBridge
Nav Data Collected: 
No
Total Flight Time: 
6.9 hours
Flight Segments: 
From:BGTLTo:BGTL
Start:04/08/19 10:50 Z Finish:04/08/19 17:43 Z
Flight Time:6.9 hours
Log Number:19P017PI:Joseph MacGregor
Funding Source:Bruce Tagg - NASA - SMD - ESD Airborne Science Program
Purpose of Flight:Science
Miles Flown:1780 miles
Flight Hour Summary: 
19P017
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.

Flight Tracks: 
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File 2_siis2arcticocean_labels.kml17.41 KB