SwathS, flight day 183/2023, Grosseto

[jann]

Data location: /users/rsg/airborne/2023_arsf_data/flight_data/italy/SwathS_23-2023_183_Grosseto

Data arrived from NERC-ARF via hard drive September/October 2023

PI: Martin Wooster

Sensors:
Fenix1k (requested, flown)
IBIS ( main requested, flown)
OWL ( requested, flown)

[jann]

Owl rename:

• Error in /users/rsg/arsf/usr/lib/python/site-packages/arsf_unpacking/common_hyperspectral_thermal.py : check_raw_sizes: Could not find hdr file for raw file: /users/rsg/arsf/arsf_data/2023/flight_data/italy/SwathS_23-2023_183_Grosseto/thermal/owl/Grosseto_OWLGrosseto_2023-07-02_09-59-19/capture/Grosseto_OWLGrosseto_2023-07-02_09-59-19.raw
• Error in /users/rsg/arsf/usr/lib/python/site-packages/arsf_unpacking/unpacking_utilities.py : write_message: Could not find hdr file for raw file: /users/rsg/arsf/arsf_data/2023/flight_data/italy/SwathS_23-2023_183_Grosseto/thermal/owl/Grosseto_OWLGrosseto_2023-07-02_09-59-19/capture/Grosseto_OWLGrosseto_2023-07-02_09-59-19.raw

Final checks:

• warning about the real time navigation time stamps was flagged
• Found empty file: /users/rsg/arsf/arsf_data/2023/flight_data/italy/SwathS_23-2023_183_Grosseto/thermal/owl/Grosseto_OWLGrosseto_2023-07-02_09-59-19/capture/Grosseto_OWLGrosseto_2023-07-02_09-59-19.log

[wja]

Navigation Processing

Basestation data converted to RINEX. All previous flights are also included in the basestation data, so just this flights data needed to be extracted (done with teqc).

GPS and GLONASS broadcast ephermides, along with precise ephemeris data accessed from CDDIS. PosPac could not access these itself.

Completed processing using the single base method. Also exported post-processed navigation data in ASCII format.

[wja]

Owl Processing

Owl data processed to level1b. Have been mapping with the following boresight:

View Angle	Pitch	Roll	Yaw
Nadir	+0.00	-0.60	+0.70
25 deg	-0.18	-0.60	+1.07
34 deg	-0.25	-0.60	+1.20

Note that 25 degree angle is not the usual 20 degree. I have scaled the values of nadir and 34 degrees to estimate this.

[wja]

Owl Processing

Note that raw file Grosseto_OWLGrosseto_2023-07-02_09-59-19 does not have a header file. It cannot be processed.

[wja]

Owl Processing

Boresight looks bad. Roll is wrong for viewing angles of 25 degrees and 34 degrees. Nadir facing data looks okay.

Investigating

[wja]

Angles vs lines for reference:

Flightline	View Angle
1	nadir
2	nadir
3	nadir
4	34 deg
5	25 deg
6	25 deg
7	34 deg
8	34 deg
9	25 deg
10	25 deg
11	34 deg
12	34 deg
13	nadir
14	nadir
15	nadir
16	34 deg
17	25 deg
18	25 deg
19	34 deg
20	34 deg
21	25 deg
22	25 deg
23	34 deg
24	nadir
25	nadir

[wja]

Owl Processing

Geocorrection errors were caused by not inputting the DEM properly.

Very minor geoaccuracy issues are present in some lines, these have been improved by adding a +0.1 second offset to the affected lines.

See below table:

Angles vs lines for reference:

Flightline	View Angle	Time Offset
1	nadir
2	nadir
3	nadir
4	34 deg
5	25 deg
6	25 deg
7	34 deg	+0.01
8	34 deg
9	25 deg	+0.01
10	25 deg	+0.01
11	34 deg
12	34 deg
13	nadir	+0.01
14	nadir
15	nadir
16	34 deg
17	25 deg	+0.01
18	25 deg
19	34 deg	+0.01
20	34 deg
21	25 deg	+0.01
22	25 deg	+0.01
23	34 deg	+0.01
24	nadir	+0.01
25	nadir	+0.01

[wja]

Owl Processing

Processing all bands.

Then will create delivery.

[wja]

Delivery Created

Ready for check

[asm]

OWL DC

All checks have been done and all test passed. Zipping mapped files and project will be ready to be delivered.
Most of the files have a few lines that at the beginning are a bit noisy in some bands but otherwise fine. It might be that those bands need a bit more time to warm up.

[asm]

OWL DC

Delivered via FTP, slot5 and notification sent on 27/08/2024.