= Instrument Calibration = The instruments are returned to their respective manufacturer (Specim and Leica) at the end of each flying season for annual maintenance and calibration. We also carry out our own in-house calibration of the Hyperspectral sensors at ARSF Gloucester. == Leica Calibration == The ALS50-II LiDAR and the RCD105 camera are calibrated at Leica Geosystems offices in Heerbrrugg, Switzerland. === Leica LiDAR === As part of the annual calibration Leica fly a test flight to check the system and provide us with a Calibration Certificate. An Intensity Based Range Correction (IBRC) file is generate for the sensor. This table is used to correct for effect of varying range based on return signal strength. Since 2012 Leica provide us with a Dual IBRC. The dual table allows for improved range correction when a lower scan rate is used during data collection. The remaining calibration parameters provided by Leica are subsequently calculated/verified during the Boresight procedure. The latest calibration certificate for the ALS50-II can be found [attachment:SN089_ALS50_Calibration_Report-130131.pdf here]. Additional calibration files provided by leica, which are used during the [wiki:ProcessingAtDAN/Lidar LiDAR processing], can be found below: Dual IBRC Table: [attachment:SN89_IBRC_Dualtable_20121218.csv SN89_IBRC_Dualtable_20120218.csv] === Leica RCD === The latest calibration certificate for the RCD105 can be found [attachment:RCD105_Cal_Cert_021_060_019_RGB_20100202.pdf here]. Additional calibration files provided by leica, which are used during the [wiki:ProcessingAtDAN/RCD camera processing], can be found below: Note that although filenames may be the same between different years, they may be different files. Files relating to RCD105 CH39 SN021 (used until day 224 2013) Bias correction: [http://arsf-dan.nerc.ac.uk/files/CH39_021_060_019_RGB_20100109_G3bl.tif CH39_021_060_019_RGB_20100109_G3bl.tif] and [http://arsf-dan.nerc.ac.uk/files/CH39_021_060_019_RGB_20100109_G3sl.tif CH39_021_060_019_RGB_20100109_G3sl.tif] [[BR]] System repsonse correction: [http://arsf-dan.nerc.ac.uk/files/CH39_021_060_019_RGB_20100109_G3gl.tif CH39_021_060_019_RGB_20100109_G3gl.tif] [[BR]] Colour Processing: [http://arsf-dan.nerc.ac.uk/files/CH39_021_060_019_RGB_20100109_G3pl.txt CH39_021_060_019_RGB_20100109_G3pl.txt] Files relating to RCD105 SN39 SN070 (used from day 260 2013) Bias correction: [http://arsf-dan.nerc.ac.uk/files/CH39_070_060_019_RGB_20100109_G3bl.tif CH39_070_060_019_RGB_20100109_G3bl.tif] and [http://arsf-dan.nerc.ac.uk/files/CH39_070_060_019_RGB_20100109_G3sl.tif CH39_070_060_019_RGB_20100109_G3sl.tif] [[BR]] System repsonse correction: [http://arsf-dan.nerc.ac.uk/files/CH39_070_060_019_RGB_20100109_G3gl.tif CH39_070_060_019_RGB_20100109_G3gl.tif] [[BR]] Colour Processing: [http://arsf-dan.nerc.ac.uk/files/CH39_070_060_019_RGB_20100109_G3pl.txt CH39_070_060_019_RGB_20100109_G3pl.txt] Files relating to RCD105 CH39 SN021 (used so far in 2014) Gain 3 files: Bias correction: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G3bl.tif CH39_021_060_019_RGB_20100109_G3bl.tif] and [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G3sl.tif CH39_021_060_019_RGB_20100109_G3sl.tif] [[BR]] System repsonse correction: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G3gl.tif CH39_021_060_019_RGB_20100109_G3gl.tif] [[BR]] Colour Processing: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G3pl.txt CH39_021_060_019_RGB_20100109_G3pl.txt] Gain 4 files: Bias correction: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G4bl.tif CH39_021_060_019_RGB_20100109_G4bl.tif] and [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G4sl.tif CH39_021_060_019_RGB_20100109_G4sl.tif] [[BR]] System repsonse correction: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G4gl.tif CH39_021_060_019_RGB_20100109_G4gl.tif] [[BR]] Colour Processing: [http://arsf-dan.nerc.ac.uk/files/rcd_2014_files/CH39_021_060_019_RGB_20100109_G4pl.txt CH39_021_060_019_RGB_20100109_G4pl.txt]