Clovis To Lander Bearing Options

[djellison]

Anyone got a good bearing angle for the lander from the pan position at Clovis - to within a couple of degrees?

Doug

[djellison]

Doh - answered own question

It'll be 360 - about 114 - so 246ish

Doug

[djellison]

Hmm - anyone know how to find out the actual pointing direction of Pancam from a pds header?


/* DERIVED GEOMETRY DATA ELEMENTS: ROVER FRAME */

GROUP = ROVER_DERIVED_GEOMETRY_PARMS
INSTRUMENT_AZIMUTH = -61.9729 <deg>
INSTRUMENT_ELEVATION = -16.6434 <deg>
REFERENCE_COORD_SYSTEM_INDEX = (85, 0, 323, 552, 272)
REFERENCE_COORD_SYSTEM_NAME = ROVER_FRAME
END_GROUP = ROVER_DERIVED_GEOMETRY_PARMS

/* DERIVED GEOMETRY DATA ELEMENTS: SITE FRAME */

GROUP = SITE_DERIVED_GEOMETRY_PARMS
INSTRUMENT_AZIMUTH = -67.1847 <deg>
INSTRUMENT_ELEVATION = 5.26536 <deg>
REFERENCE_COORD_SYSTEM_INDEX = 85
REFERENCE_COORD_SYSTEM_NAME = SITE_FRAME
SOLAR_AZIMUTH = 17.0203 <deg>
SOLAR_ELEVATION = -49.2353 <deg>
END_GROUP = SITE_DERIVED_GEOMETRY_PARMS


I'm asuming -67 is 67 deg left of looking straight forward - but is there anywhere that shows the pointing of the rover itself allowing to calculate a bearing for a pancam image?

Doug

[alan]

Doug check out this thread
http://www.markcarey.com/mars/discuss-2315...e-measured.html

[Deimos]

Hmm - anyone know how to find out the actual pointing direction of Pancam from a pds header?


/* DERIVED GEOMETRY DATA ELEMENTS: ROVER FRAME */

GROUP                            = ROVER_DERIVED_GEOMETRY_PARMS
  INSTRUMENT_AZIMUTH            = -61.9729 <deg>
  INSTRUMENT_ELEVATION          = -16.6434 <deg>
  REFERENCE_COORD_SYSTEM_INDEX  = (85, 0, 323, 552, 272)
  REFERENCE_COORD_SYSTEM_NAME    = ROVER_FRAME
END_GROUP                        = ROVER_DERIVED_GEOMETRY_PARMS

/* DERIVED GEOMETRY DATA ELEMENTS: SITE FRAME */

GROUP                            = SITE_DERIVED_GEOMETRY_PARMS
  INSTRUMENT_AZIMUTH            = -67.1847 <deg>
  INSTRUMENT_ELEVATION          = 5.26536 <deg>
  REFERENCE_COORD_SYSTEM_INDEX  = 85
  REFERENCE_COORD_SYSTEM_NAME    = SITE_FRAME
  SOLAR_AZIMUTH                  = 17.0203 <deg>
  SOLAR_ELEVATION                = -49.2353 <deg>
END_GROUP                        = SITE_DERIVED_GEOMETRY_PARMS


I'm asuming -67 is 67 deg left of looking straight forward - but is there anywhere that shows the pointing of the rover itself allowing to calculate a bearing for a pancam image?

Doug

In the "rover frame" block, the azimuth and elevation are from straight ahead and from parallel to the deck. In the site frame block, instrument azimuth and elevation are from north and from level. Az is deg E of N, El is positive down (making the coordinate system right-handed with XYZ = NED). If you care about 1 deg, you have to check whether it was a 2-filter image, I think. In a mono image, the direction is the center of the image, whichever eye. In a 2-filter image (stereo or 2 colors), it is the average of right and left (which are pointed 2 deg apart). So, the image appears to be 67 deg W of N and 5 deg below true-level.