Forum

High-rate GNSS data files are available through anonymous ftp and other methods. These high-rate GNSS data are available since May 2001. Access the high-rate GNSS data by using one of the following methods: anonymous ftp at URL ftp://cddis.gsfc.nasa.gov/gnss/data/highrate/. NOTE this method will be ...

Hourly GNSS data files are available in hourly subdirectories within the filesystem https://cddis.nasa.gov/archive/gnss/data/hourly/ YYYY / DDD / HH , where YYYY is the four-digit year, DDD is the three-digit day of year, and HH is the numeric hour of the day (00, 01, ... 23). All data are stored in...

Hourly GNSS data files are available through anonymous ftp and other methods. Hourly GNSS data are available for the last three days. These data are removed after that time since files containing a full day's worth of data are available. Access the hourly GNSS data by using one of the following meth...

GNSS data are available in daily subdirectories of the form https://cddis.nasa.gov/archive/gnss/data/daily/ yyyy / ddd , where yyyy is the four-digit year and ddd is the three-digit day of year. All data are stored in RINEX format . More information on daily data is available at https://cddis.nasa.g...

The CDDIS provides an archive of GNSS data in support of the International GNSS Service (IGS, www.igs.org). We have data in daily files (30 second sampling) going back to 1991, hourly files (30 second sampling), and high-rate files (1 second sampling). The daily data are typically delivered to the C...

An index.html file is required in order for web browsers to be able to display the contents of a directory in a proper format. This file is used when accessing the CDDIS archive through https. There is no harm in downloading this file; however, if you prefer to not retrieve the index.html file, you ...

The CDDIS acronym list is available at URL https://cddis.nasa.gov/About/Acronyms.html.

The list of satellite identifiers for SP3 orbit files is available at URL http://cddis.gsfc.nasa.gov/Techniques/sp3c_satlist.html.

The timestamp of all files in the archive refers to local time at the CDDIS (EST or EDT).

The .Z indicates the file was compressed using UNIX compression, e.g., the UNIX compress command. Users on UNIX systems can use the command uncompress to expand the file. Users on non-UNIX systems can consult the gzip web site. Note that ftp transfers of compressed files must be performed using bina...