= 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||flip||


Unsure why the Ibis needs flipping with the Canada install but it definitely does.

= 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||-0.45 +0.05 +0.00||-0.09 +0.25 -0.25|| -0.48 -0.27 -0.50||



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 (julian day 179):
||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.


= Swath Masking =

The Fenix1k and Ibis field of view is obstructed by the aircraft throughout this flying season. This appears as a vignette and needs to masked during aplcal. The following mask files have been made to achieve this.

||Installation||Julian Range||Fenix1k||Ibis||
||Italy 1||143 - 152|| f1k_swathedge_mask.txt || ||
||Italy 2|| 176 - 183|| f1k_swathedge_mask.txt || ||
||UK||190 - 200|| f1k_swathedge_mask.txt || ||
||Canada||226-235|| || ||