Changes between Initial Version and Version 1 of Processing/Boresighting

Feb 28, 2012 3:12:31 PM (7 years ago)



  • Processing/Boresighting

    v1 v1  
     1= Instrument Boresighting =
     3When fitted in the aircraft the remote sensing instruments do not have a prefect nadir pointing direction. Typically this will be off by a small amount (a fraction of degree) in 3 degrees of freedom. This angular offset needs to be calculated to get precise geocorrection and positioning on the ground. To show the importance of this, for example, if there is an error of 0.5 degrees in the view vector, at an altitude of 1000m this could lead to an error of about 10m at the swath edge.
     5Every time the instruments are placed in the aircraft a new boresight flight has to be undertaken over the [wiki:Processing/CalibSite calibration site]. This may just be at the start of the flying season or multiple times throughout the year. At the end of the flying season a boresight flight is undertaken to check if any change has occurred.
     7== Hyperspectral Boresight Procedure ==
     9Flight requirements:
     11 * Multiple flight lines taken along different flight paths
     12  * Opposite and overlapping: e.g. 1 line North and 1 line South
     13  * Parallel and overlapping: e.g. 2 lines East
     14  * A third direction: e.g. NorthEast
     16Typically we collect fully overlapping flight lines going along the compass directions: N, NE, E, SE, S, SW, W, NW
     18Processing technique: