Search found 59 matches

by CDDIS_support_Lori
Fri Feb 14, 2020 11:21 am America/New_York
Forum: Questions/Comments
Question: Accuracy of GNSS products
Replies: 1

Re: Accuracy of GNSS products

The IGS Central Bureau maintains a table of accuracy information for the official IGS products. Additional information is available from a web page maintained by the Analysis Center Coordinator.
by CDDIS_support_Lori
Fri Feb 14, 2020 11:18 am America/New_York
Forum: Questions/Comments
Question: Products derived from GNSS data
Replies: 1

Re: Products derived from GNSS data

GNSS products are available through anonymous ftp and other methods. GNSS products (preceise ephemerides) since June 1992 are available online. Access the GNSS products by using one of the following methods: anonymous ftp at URL ftp://cddis.gsfc.nasa.gov/gnss/products/. NOTE this method will be disc...
by CDDIS_support_Lori
Fri Feb 14, 2020 11:11 am America/New_York
Forum: Questions/Comments
Question: Data products at CDDIS
Replies: 1

Re: Data products at CDDIS

Products derived from GNSS data and available from the CDDIS are provided by analysis centers supporting the International GNSS Service (IGS). IGS operational products include precise GNSS satellite ephemerides, positions and velocities of stations in the global GNSS network, EOPs (polar motion and ...
by CDDIS_support_Lori
Fri Feb 14, 2020 11:00 am America/New_York
Forum: Questions/Comments
Question: high-rate GNSS data files
Replies: 1

Re: high-rate GNSS data files

High-rate GNSS data files are available in hourly subdirectories within the filesystem at https://cddis.nasa.gov/archive/gnss/data/highrate/ YYYY / DDD / YYt / HH / where YYYY is the four-digit year, DDD is the 3-digit day of year, YY is the 2-digit year, t is the type of data, and HH is the numeric...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:52 am America/New_York
Forum: Questions/Comments
Question: Accessing high-rate GNSS data
Replies: 1

Re: Accessing high-rate GNSS data

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 ...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:49 am America/New_York
Forum: Questions/Comments
Question: How are the hourly GNSS data files stored?
Replies: 1

Re: How are the hourly GNSS data files stored?

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...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:27 am America/New_York
Forum: Questions/Comments
Question: Accessing hourly GNSS data
Replies: 1

Re: Accessing hourly GNSS data

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...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:23 am America/New_York
Forum: Questions/Comments
Question: How are daily GNSS files stored?
Replies: 1

Re: How are daily GNSS files stored?

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...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:15 am America/New_York
Forum: Questions/Comments
Question: GNSS data from CDDIS
Replies: 1

Re: GNSS data from CDDIS

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...
by CDDIS_support_Lori
Fri Feb 14, 2020 10:13 am America/New_York
Forum: Questions/Comments
Question: index.html file in CDDIS archive directories
Replies: 1

Re: index.html file in CDDIS archive directories

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 ...