Opened 3 years ago

Last modified 2 years ago

#678 new flight processing

SwathS, flight day 223b/2021, Attleborough

Reported by: wja Owned by:
Priority: immediate Milestone:
Component: Processing: general Keywords:
Cc: Other processors:


Data location: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough

Data arrived from Kings College London via FTP on September 20th 2021

Scientific objective: Joint NASA and ESA campaign flying JPL’s HyTES thermal instrument over sites in Europe with a focus on crops and soil.

PI: Martin Wooster

Change History (9)

comment:1 Changed 3 years ago by wja


Following for flagging when running the unpacking checks:

  • `There has been an incident on line 14567 with 50 dropped frames recorded on file: /users/rsg/arsf/arsf_data/2021/fligh


  • There are fps_set in Fenix1k header files
  • FPS differs in the followng hdr files:
    fps differs from fps_qpf by 0.65 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough/
    fps differs from fps_qpf by -0.52 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough
    fps differs from fps_qpf by 0.6 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough/h
    fps differs from fps_qpf by 0.6 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough/h
    fps differs from fps_qpf by 0.6 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough/h
    fps differs from fps_qpf by 0.82 in file: /users/rsg/arsf/arsf_data/2021/flight_data/uk/SwathS-2021_223b_Attleborough/
  • The following error regaring real time nav data:
No date record ($GPZDA) found in nav file - will assume it is binary if cannot find a line starting with '$GPGGA' or '
Error in /users/rsg/arsf/usr/lib/python/site-packages/arsf_unpacking/ : write_message: Nav file 
does not have time stamps or failed to read the file using readAscii: /users/rsg/arsf/arsf_data/2021/flight_data/uk/Sw
Last edited 3 years ago by wja (previous) (diff)

comment:2 Changed 3 years ago by wja

Navigation Processing

Navigation data processed using the 'SmartBase' method with the following OS basestations:

  • ALDB
  • ARDL
  • NEWR
  • SNEO
  • STEE
  • WEYB

POSPac data quality report shows an position error RMS of < 2cm vertical and < 1cm horizontal.

comment:3 Changed 3 years ago by wja

Hyperspectral Processing

Wavelengths in headers updated with: -w /users/rsg/arsf/calibration/2021/fenix1k/wlcal2b_vnir_1b_swir.txt hyperspectral/fenix/F*/capture/*hdr

comment:4 Changed 3 years ago by wja

Hyperspectral Processing

No clear SCT error present. No offsets required.

However, line 6 part 01 has a large 'wobble' in it which has resulted in poor alignment with other lines. This could be a very slight SCT error exaggerated by the wobble, or possibly poor navigation data when the plane doesa a sharp turn. I will investiage.

comment:5 Changed 2 years ago by wja

Hyperspectral Processing

Alignment looks good with minor timing corrections added to two lines only:

LineSCT Error

Proceeding to process all bands

comment:6 Changed 2 years ago by wja

Ready for checking

Delivery created, logsheet and ReadMe generated.

comment:7 Changed 2 years ago by dac

Delivery Check

  • edges.txt file in delivery folder - removed
  • In logsheet 'SwathS/21 -' looks like it is missing something after, should it also have the jday of the flight?
  • Nothing in the delivery to say the lines have been split and why - not sure if we normally do this (perhaps we should)
    • There is a lot of cloud shadow in the images, something which should be mentioned in the 'Quality Issues' section of the readme as might cause problems for the atmospheric correction.
  • No overlap between lines over site to the south so difficult to evaluate alignment between liens.
  • Alignment looks good. Checked against OS District Buildings data and align well with these. Only exception is in the north of lines 3 and 4 they looks slightly off but by a very small amount, not sure could get much better.
  • Spectra looks good compared to Py6S simulations.

After checking text in readme and logsheet and either confirming as intended or correcting then good to go.

comment:8 Changed 2 years ago by wja

Delivery Check

Have edited ReadMe and logsheet. Zipping mapped data.

comment:9 Changed 2 years ago by wja


Placed on FTP slot 5, PI notified.

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