2023 Installations

The 2023 campaign saw four differnt configorations of instruments on board the VP-FBL Twin Otter in Italy, UK and Canada.

Instrument Orientations

Note: I believe that the IMU being "backwards" is the way our processing systems expect it.

Installation	Julian Range	IMU	Owl	Fenix1k	Ibis	PhaseOne
Italy 1	143 - 152	Backwards	Backwards	Backwards	Forwards	Forwards
Italy 2	176 - 183	Backwards	Backwards	Backwards	Forwards	Forwards
UK	190 - 200	Forwards	Not Installed	Backwards	Forwards	Forwards
Canada	226-235	Forwards	Forwards	Backwards	Forwards	Forwards

The following should outline the data from which instruments which requires across-sample flipping in order to map.

Installation	Julian Range	Owl	Fenix1k	Ibis
Italy 1	143 - 152			flip
Italy 2	176 - 183			flip
UK	190 - 200		flip
Canada	226-235		flip

Boresight Values

Values are in the format of pitch, roll and yaw.

Installation	Julian Range	Fenix1k	Ibis	Owl
Italy 1	143 - 152	0.63 -1.10 1.90	0.18 -1.60 1.00	See below
Italy 2	176 - 183			See below
UK	190 - 200	0.45 -0.10 1.50	-0.20 -0.70 0.75	Not installed
Canada	226 - 235

The Owl boresighting for the Italy flights is more complicated as it was on a movable mount allowing data to be collected a different angles. Each angle changes the boresight offsets.

Italy 1 Owl Boresight:

Angle	Pitch	Roll	Heading
Nadir
20
35

Italy 2 Owl Boresight:

Angle	Pitch	Roll	Heading
Nadir	0	-0.60	0.70
20	-0.15	-0.60	0.99
34	-0.25	-0.60	1.20

Note: Offsets for the 20 degrees looking angle have been estimated by scaling the difference between the nadir and 34 degree offsets.