NASA will be performing network maintenance on Thursday, February 6, 2025, between 9:00 AM EST and 11:00 AM EST (14:00 to 16:00 UTC). There will be a few periods of disruption. This will result in the of the unavailability of the SGP website during these periods. If you experience problems outside this window, contact support-cddis@nasa.gov.

close window

NASA Pinning Down "Here" Better Than Ever





NASA is helping to lead an international effort to upgrade the four systems that supply crucial location information in pinpointing where "here" is. (02/23/2012)