International Laser Ranging Service

Data Correction Free Format

The purpose of this page is to list discovered anomalies in SLR and LLR data. To date, the following problems have been documented.

ALL of these "Corrections" are now included in the official ILRS Data Handing file

• Station 7824 Interval Counter Frequency Reference Failure (17 June to 18 June 2015)
• Station 7110 Range Error (23 Feb 23 to 09 Mar 2012)
• Station 7119 Barometer Error (30 Jan to 31 Jan 2012)
• Station 7941 Range Bias (16 Feb to 22 Oct 2007)
• Station 7124 Range Bias (May to 1 July, 2004)
• Station 7210 Epoch Time Bias (2 June to 4 August 1999)
• Station 7105 Unrecoverable Epoch Time Bias (29 April to 3 May 1999)
• Station 7105 Epoch Time Bias (4-10 March 1999)
• Station 7110 Epoch Time Bias (25-26 November 1998)
• Station 7090 Epoch Time Bias (21 December 1998)
• Station 7210 Barometer Error (18 June 1996 to 24 November 1996)
• Station 7837 Epoch Time Bias (22 May 1998)
• Replacement SLR Data Issued for Stations (1864, 1868, 1870) (September 1996 to December 1997)
• Station 7090 Frequency Error (16-27 January 1998)
• Station 1884 Fixed Range Bias (1 January 1994 to 1 September 1997)
• Station 7810 Fixed Range Bias and Epoch Time Bias (10 July 1997 to 3 September 1997)
• Station 7810 Fixed Range Bias (9-17 July 1997)
• Station 7832 Epoch Time Bias (29 May 1997 to 25 June 1997)
• Station 7210 Epoch Time Bias (12 January 1988 to 2 December 1988)
• Station 7210 Epoch Time Bias (13 December 1995 to 15 June 1995)
• Station 7109 Epoch Time Bias (3-16 December 1996 and 9-17 January 1997)
• Station 7403 Epoch Time Bias (24 January 1997 to 10 March 1997)
• Station 7308 Epoch Time Bias (11-27 February 1997)
• Station 7109 Fixed Range Bias (9-17 January 1997)
• Recall of NASA SLR GPS Data (24 October 1996 to 2 December 1996)
• Station 7110 Fixed Range Bias (27 August 1996 to 2 October 1996)
• Station 7090 Epoch Timing Error (18 July 1996 to 02 August 1996)
• Station 7080 Barometer Error (6 March 1995 to 25 April 1996)
• Station 7840 Humidity Error (24 December 1995 to 12 February 1996)
• Station 7110 Barometer Error (15 April 1995 to 19 December 1995)
• Station 7109 Barometer Error (11-14 October 1995)
• Station 7543 Revised Eccentricities and Range Bias (1993)
• Station 7580 Revised Eccentricities and Range Bias (1992)
• Station 7587 Revised Eccentricities and Range Bias (1992)
• Station 7517 Revised Eccentricities and Range Bias (1992)
• Station 7525 Revised Eccentricities and Range Bias (1992)
• NASA Network Biases, in pdf, in MS Word, (1983 to 1992)
• GSFC-formed normal points from LAGEOS full-rate data (1976 to 1993)