Skip to Content Site Navigation Tree Accessibility

ERS Orbit Prediction Error

The following table shows the RMS of the daily computed along-track errors for ERS-2 only.

ERS-2 (meters)
Monthafter 1 dayafter 3 daysafter 6 days Comment
October 2005 1379257 .
September 2005 1799349 .
August 2005 25122410 .
July 2005 15116433 .
June 2005 1593306 .
May 2005 31186616 .
April 2005 1698284 .
March 2005 1495355 .
February 2005 17146516 .
January 2005 23202594 .
December 2004 14152648 .
November 2004 23290732 .
October 2004 17181616 .
September 2004 1684293 .
August 2004 1795319 .
July 2004 22155489 .
June 2004 1158223 Only half a month of statistics available
May 2004 1485257 Only half a month of statistics available
April 2004 No statistics available
March 2004 No statistics available
February 2004 No statistics available
January 2004 No statistics available
December 2003 No statistics available
November 2003 No statistics available
October 2003 51254924 .
September 2003 20162523 .
August 2003 41242930 .
July 2003 No reliable statistics
June 2003 26192790 .
May 2003 593851353 .
April 2003 31216868 .
March 2003 644551802 .
February 2003 1104751506 .
January 2003 110447733 .
December 2002 956532523 .
November 2002 955571922 .
October 2002 109435726 .
September 2002 119721 Peaks of increased solar activity
August 2002 735541657 .
July 2002 29162784 .
June 2002 363181405 .
May 2002 914431394 .
April 2002 .
March 2002 .
February 2002 .
January 2002 .
December 2001 2701252 .
November 2001 416 Increased solar activity and manoeuvres
October 2001 389 Increased solar activity
September 2001 1831306 .
August 2001 107365825 .
July 2001 35272818 .
June 2001 372701323 .
May 2001 79637 .
April 2001 2891297 .
March 2001 3041341 .
February 2001 No reliable statistics available
January 2001 41206764 Only first half of January used because of safe mode
December 2000 146989 .
November 2000 2832210 Increased solar activity and a higher number of manoeuvres required than usual
October 2000 3421570 Increased solar activity
September 2000 1451049 .
August 2000 956581031 .
July 2000 30213551067 Short burst of high solar activity mid July
June 2000 756301762 .
May 2000 1117811281 .
April 2000 16310672379 .
March 2000 2201881 Large fluctuations of solar activity

The following table shows the RMS of the daily computed along-track errors for both ERS-1 and ERS-2.

ERS-1 / ERS-2 (meters)
Monthafter 1 dayafter 3 daysafter 6 days Comment
February 2000 160 / 300945 / 1809– / – ERS-2 monogyro piloting started
January 2000 86 / 77368 / 346970 / 846 .
December ’99 86 / 78619 / 572– / 1901 .
November ’99 154 / 136713 / 910– / – .
October ’99 126 /117739 / 677– / – .
September ’99 73 / 72443 / 398– / 1031 .
August ’99 78 / 56554 / 408– / 875 .
July ’99 202 / 64884 / 495– / 1787 .
June ’99 39 / 38330 / 319– / 1315 .
May ’99 34 / 31254 / 2131039 / 763 .
February ’99 88 / 88618 / 6102401 / 2268 .
January ’99 – / 46– / 296– / 1036 No reliable statistics for ERS-1
December ’98 59 / 61493 / 4861049 / 1916 .
November ’98 – / 91– / 637– / – No reliable statistics for ERS-1 due to frequent manoeuvres and on-board anomaly
October ’98 – / 45– / 251– / 894 No reliable statistics for ERS-1 due to frequent manoeuvres
September ’98 56 / 50458 / 3701505 / 1268 .
August ’98 84 / 47363 / 2801290 / 1049 .
July ’98 26 / 21121 / 90388 / 327 .
November ’97 24 / 19113 / 98357 / 266 .
October ’97 23 / 15117 / 99346 / 228 .
September ’97 17 / 1986 / 85316 / 315 .
August ’97 13 / 1452 / 55168 / 182 .
July ’97 13 / 1350 / 47175 / 143 .
June ’97 14 / 1662 / 66245 / 244 .
May ’97 19 / 1782 / 68257 / 179 .
April ’97 16 / 1682 / 58278 / 213 .
March ’97 16 / 1481 / 71257 / 218 .
February ’97 11 / (15)50 / (47)184 / (148) .
January ’97 12 / 1440 / 46117 / 148 .
December ’96 14 / 1460 / 76190 / (101) .
November ’96 17 / 1691 / 84306 / 247 .
October ’96 37 / 15122 / 97393 / 328 .
September ’96 16 / 1695 / 79322 / 260 .
August ’96 12 / 1539 / 5486 / 116 .
July ’96 14 / 1575 / 77298 / 312 .
June ’96 14 / 3166 / 90247 / 267 .
May ’96 14 / 1459 / 55101 / 158 .
April ’96 16 / 1475 / 67164 / 139 .
March ’96 12 / 1349 / 51162 / 195 .
February ’96 15 / 1356 / 57195 / 187 .
January ’96 16 / 5775 / 171220 / 289 ERS-2 values affected by anomaly (unmodeled thrusting)
December ’95 15 / 1464 / 68215 / 280 .
November ’95 36 / 15122 / 56177 / 178 .
October ’95 30 / 20111 / 98326 / 274 .
September ’95 13 / 1850 / 53148 / 106 .
August ’95 14 / 1458 / 57201 / 200 .
July ’95 14 / 1250 / 51173 / 165 .
June ’95 17 / 1671 / 72197 / 227 .
May ’95 23 / 18105 / 97202 / 199 .