ROLL.TXT: ROLL ANGLE ANCILLARY DATA FILE This file contains roll angle estimates history as derived from SIR-C null tracking algorithms developed by J. C. Curlander, et al. GMT is expressed as (YYYY/ddd:hh:mm:ss.s). Roll angles are expressed in degrees. 1 2 3 4 5 6 7 1234567890123456789012345678901234567890123456789012345678901234567890123456 Data Take ID: 66.20 Site Name: Near ERS-1 SAR calib site Site ID: H11 No. of Ancillary Data Records: 14 GMT Roll Angle 1994/277:11:54:45.0 26.04 1994/277:11:54:51.9 26.06 1994/277:11:54:58.7 26.08 1994/277:11:55:05.6 26.09 1994/277:11:55:12.5 26.07 1994/277:11:55:19.4 26.05 1994/277:11:55:26.3 26.05 1994/277:11:55:33.2 26.03 1994/277:11:55:40.1 26.04 1994/277:11:55:46.9 26.03 1994/277:11:55:53.8 26.03 1994/277:11:56:00.7 26.03 1994/277:11:56:07.6 26.04 1994/277:11:56:14.5 26.05