Opened 10 years ago

Last modified 9 years ago

#538 new flight processing

GB14/00, flight day 238/2014, Little Rissington

Reported by: knpa Owned by:
Priority: immediate Milestone: 2014 data processing completion
Component: Processing: LIDAR Keywords:
Cc: Other processors:


Data location: /users/rsg/arsf/arsf_data/2014/flight_data/arsf_internal/GB14_00-2014_238_Little_Riss_LiDAR

Data arrived from ARSF via network transfer on 27/08/2014

GB14/00 Scientific objective: Boresight

GB14/00 Priority: urgent


Notes: LiDAR Calibration over little riss Affects all data from: Night time flight - can't use hyperspectral


Fenix (Requested)
LiDAR (Requested)

Change History (10)

comment:1 Changed 10 years ago by mark1

Have copied the owl data over from thelma that was not downloaded during the initial rsync due to time restrictions.

comment:2 Changed 10 years ago by stgo

Processed nav data and got a less than 5cm accuracy solution. More than acceptable.

comment:3 Changed 10 years ago by lah

Attune has give Roll -0.00640592, Pitch 0.00012318 and Heading 0.00000548 with average residuals X 0.266, Y 0.286 and aposteriori 1.4443 for 286 observations. Examined in LAG and needs further tweaking. Also looks like variable roll and pitch for each flight line.

comment:4 Changed 10 years ago by lah

Reprocessed with alspp using correct .reg file (torsion and latency settings). New offsets:
Roll: -0.00645597
Pitch: 0.00009318
Heading 0.00002661

comment:5 Changed 10 years ago by lah

Calculated range corrections:
A1: -2.169 B1: -2.169
A2: -2.161 B2: -2.167
A3: -2.133 B3: -2.174
A4: -2.178 B4: -2.149

No offset between bank A and B observed. Possibly some error with torsion, needs checking.

comment:6 Changed 10 years ago by lah

Changed pitch slope error to -0.000001 and pitch offset to 0.00016318.

comment:7 Changed 10 years ago by lah

  • Tweaked heading to 0.00008.
  • Altered roll to compromise between medium and high altitudes: -0.006375. (Med alt best r = -0.006300)
  • Redone range calibration for new values:

A1: -2.063 B1: -2.063
A2: -2.055 B2: -2.061
A3: -2.027 B3: -2.068
A4: -2.072 B4: -2.043

  • Gives mean offsets:

low: -0.29 cm
med: -6.41 cm
high: -1.11 cm

Now needs checking

Last edited 10 years ago by lah (previous) (diff)

comment:8 Changed 10 years ago by dac

Have checked values for 219b (Ticket 535) and look fine.

comment:9 Changed 9 years ago by lah

Good owl data set. Using as boresight. SCTs:

Flightline FENIX
1 0.00
2 0.15
3 0.99
4 0.98
7 1.00

Found boresight values: 0.12, -0.32 & 0.32

comment:10 Changed 9 years ago by dac


Redid boresight without FLA so it can be used in alsproc. New values are:

Roll: -0.00635
Pitch: -0.00175
Heading: 8e-005
Pitch Slope Error: -1e-5

Have added these values to the default alsproc config file and created a new reg file '2014_238_calibration_no_fla.reg'.

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