Magic, flight day 239/2021, Kiruna, Sweden

[wja]

Data location: /users/rsg/arsf/arsf_data/2021/flight_data/sweden/Magic-2021_239_Kiruna/
Data arrived from Kings College London via hardrive from Sweden on September 20th 2021.

Scientific objective: International project (includes NASA, CNRS, ESA, DLR, Eumetsat) to monitor and identify methane inventories in the arctic. JPL's HyTES instrument was utilised. A total of three aircraft were used to collect data, along with deployed balloons and ground measurments.

PI: Martin Wooster

[wja]

Unpacking

• First line does not have a header file. Logshet reports "Workflow Failed".
• run_unpacked_checks.py report nav time issue

[wja]

Navigation Processing

It seems all the Sweden flights' navigation data has been stored in this flight's project directory.

Have moved all non-239 duplicates into their own subdirectory under possat/applanix/non_239/

KIRU basestation downloaded from epncb.eu

Computed RTX coordinates for KIRU:

• Horizontal sigma: 0.005 m
• Vertical sigma: 0.005

Exported SBET solution:

• Horizontal RMSE < 2 cm
• Vertical RMSE < 25cm

[wja]

Hyperspectral Processing

Wavelengths replaced in fenix headers. All data binned to factor of 2.

3 band RGB of all lines mapped. Some minor geolocation issues, unsure if boresight, SCT error or navigation issue at first glance - initial opinion is heading boresight error when looking at overlapping region of the following flightlines:

• line 3
• line 6 part 1
• line 25 part 1

[wja]

Hyperspectral Processing

Line 7 header ending location is incorrect. Corrected 'GPS Ending Point' to approximate location that mapped line ends at.

From -11.323164, -270.877258 to 67.923537, 20.135768 (unsure why this was recorded).

[wja]

Ready for Checking

All band processed.

[asm]

Hyperspectral DC

In progress
-There is no project information xml file
-APL commands run OK (when selected the appropiate version)
-Good overlapping match in the level3b files.
-Nearly done with fastQC. The number of underflows is related to the mass of water but it is not too bad over land but I suggest to leave the table as it is.
-Include however a note on the readme. Instead of:
There is significant noise and underflows in the majority of bands in all flightlines. This is most
likely due to the low sun elevation causing low ground illumination during data acquisition. Care
should be taken when using measurments in the affected bands.
Include:
There is significant noise and underflows in the majority of bands in all flightlines as noted in the table. This is due to the large water bodies present in most flightlines and the low sun elevation causing low ground illumination during data acquisition. Although this effect is not pronounced over land, care should be taken when using measurments in the affected bands.
-Fixed py6s checks. Spectra looks to have good shape but low and a bit noisy at times. Specially under 500nm or above 1800nm.

[asm]

Hyperspectral DC

All checks made with the exception of the xml files and missing project file. All looking good once that is sorted and the Readme is updated.

[wja]

Delivery

Updated ReadMe, created project XML, zipping mapped lines.

[wja]

Archiving

Created JSONs, committed them to database.

Ready to sync to CEDA.

[wja]

Archiving

Transfer to CEDA will start once flight 238 is finished (ticket #681)

[wja]

Archiving

Transfer to CEDA complete