Yann wrote: > You are referring to the config file (as example below from help file): > 1) -> 8 (Landsat ETM+ geometrical conditions) > 2) -> 2 19 13.00 -47.410 -20.234 (month,day,hh.ddd,long.,lat.) (hh.ddd=the > decimal hour in universal time) > 3) -> 1 (tropical atmospheric mode) > 4) -> 1 (continental aerosols model) > 5) -> 15 (visibility in km (aerosol model > concentration) > 6) -> -.600 (target at 600 m above sea level) > 7) -> -1000 (sensor on board of satellite) > 8) -> 64 (fourth band of ETM+ Landsat 7) > > As far as I can see, the documentation deal with: > A) Geometrical conditions (ref. to #1) > B) Atmospheric model (ref. to #3) > C) Aerosols model (ref. to #4) > D) Aerosol model concentration (ref. to #5) > E) Target altitude sensor platform (ref. to #6) > F) Sensor band (ref. to #8) > > Missing detailed descriptions are for: > #2) This is Sensor overpass details (in image header generally) > #7) This is less known to me since it is specifying the type of sensor, in > this case (as all of my work) it is a satellite platform holding the sensor. > I guess there is another value for airborne sensors, and this can be found in > the 6S manual.
Thanks. I'm slowly understanding how this all works and I've been updating/fixing the manual step by step for the last past hours. I'm going to commit it after sorting out few remaining things: 1. The example parameters file you quote says that ".-600" in line 6 means "target at 600 m ASL". However, in the i.attcor documentation, section E of "6S CODE PARAMETER CHOICES" says: "xps <=0. means the target is at the sea level". This is contrary. Can you please explain? 2. Section E - I'm not sure if the "-100< xpp <0" shouldn't actually be "-1000< xpp <0". ? 3. What is the "iaer" that section D refers to? 4. BTW section D - what "Aerosol model concentration" is supposed to mean? As it is now, it means, other words, "a concentration of the aerosol model", which doesn't make sense IMHO. What should I change it to? Maciek _______________________________________________ grass-dev mailing list [email protected] http://grass.itc.it/mailman/listinfo/grass-dev
