Time Tag Errors

interval             stn  error
Oct.30-Nov.19, 1991  LEM  Time tag data are 2 hours behind the correct time.
Nov.2-16, 1991       BRV  Time tag data are 1 hour ahead of the correct time.
Nov.24-Dec.7, 1992   BRV  Time tag data are 10 hours ahead of the correct time.
Nov.25-Dec.6, 1993   ADL  Time tag data are 1 hour behind the correct time.
Dec.7,'93-Jan.17,'94 KOT  Time tag data are 2 hours behind the correct time.
Jan.18-22, 1994      CBI  Time tag data are 9 hours ahead of the correct time.
Mar.18-Apr.27, 1994  CBI  Time tag data are 1 day behind the correct time.
Mar.17-Apr.18, 1994  WEP  Time tag data are 6 hours behind the correct time.
Apr.21-Jul.29, 1994  WEP  Time tag data are 6 hours behind the correct time.
Mar.24-May 6, 1995   BRV  Time tag data are 1 day behind the correct time.
Apr.7-9, 1995        ADL  Time tag data are 1 hour behind the correct time.
Apr.27-29, 1995      ADL  Time tag data are 1 hour behind the correct time.
May 23-25, 1995      ADL  Time tag data are 1 hour behind the correct time.
Nov.1-Dec.9, 1995    CBI  Time tag data are 12 hours behind the correct time.
Mar.9-28, 1996       ADL  Time tag data are 1 day ahead the correct time.
Feb.15-Mar.7, 1997   ONW  Time tag data are 1 day behind the correct time.  
Feb.28, 1997         BIK  Time tag data are 1 hour behind the correct time.  
Mar.5-12, 1997       YAP  Time tag data are incorrect. 
May 22-29, 1997      YAP  Time tag data are incorrect.  
Jul. 1-Dec. 31, 1997 YMK  Time tag data are 9 hours ahead the correct time.  
Apr.29-May 22, 1998  WEP  Time tag data are 12 hours ahead the correct time. 
Apr.24-May 22, 1998  DAL  Time tag data are 1 hour behind the correct time. 
Aug.29-Sep.17, 1998  DAL  Time tag data are 1.5 hour behind the correct time.
Sep.24-Oct.22, 1998  DAL  Time tag data are 1.5 hour ahead the correct time. 
Nov.16, 1998 -       DAL  Time tag data are 1.5 hour ahead the correct time.
Apr.14-May 7, 1999   KAT  Time tag data are 9 hours ahead the correct time.

Apr.4-19, 2001       MCQ  Time tag data are 12 hours ahead of correct time. 
Apr.20-Sep.22, 2001  MCQ  Time tag data are 1 day ahead the correct time.   

Geomagnetic Observation by Magnetometer Network.