Patent Document ID: 9952146
Application ID: 15583312
Patent Status: 1

Claim One:
1. A method of determining gas concentration at a region of a planetary surface, comprising the steps of: providing a gas filter correlation radiometry (GFCR) system at a location above a planetary surface, said GFCR system including a processor and a GFCR sensor having a first gas cell containing a target gas and a second gas cell wherein said second gas cell does not contain said target gas; generating, using said GFCR sensor, first images of a region of the planetary surface captured through said first gas cell and second images of the region captured through said second gas cell; providing data on altitude variations of the region indicative of a terrain elevation map of the region; generating, using said processor, ratio images for the region using said first images and said second images; and iteratively generating, using said processor, a derived terrain elevation map of the region using said ratio images and values for a mixing ratio of said target gas and a column abundance of said target gas wherein concentration of said target gas above the region is indicated when a best fit is achieved between said terrain elevation map and said derived terrain elevation map.