RE: how to collect GCPs in ascending mode of ASAR??

["Michael Lynch" <michael.lynch@xxxxxxxxx>]

MIRROR may help. CDASAR will import your N1 file but is still lacking the
flip. I have mentioned this to PCI support in the past. I was suppose to
follow up but haven't had a chance.


-----Original Message-----
From: Nacho Cardiel [mailto:ncardiel@xxxxxxxxx] 
Sent: October 27, 2008 5:21 PM
To: discuss@xxxxxxxxxxxxxxxx
Subject: how to collect GCPs in ascending mode of ASAR??


Dear List,

I have several ENVISAT ASAR scenes. Some of them are in ascending and other
are descending mode. I am using OrthoEngine to orthorectify them with the
Toutin's model.

In the ascending mode the northward of the scenes are down. I am having
several problems to collect my GCPs because of the view is rotated
completelly different than my georreferenced scene. How must I proceed?

I tried to make an expedite geocoding using the GCPs which are coming with
the scene but the result was a mess: upside is down yet. After the
georeferencing proccess northward is southward, so georeferencing is
unsucessfully.  :-?

Any help is welcome.