Search found 55 matches

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

Re: CDDIS acronyms

The CDDIS acronym list is available at URL https://cddis.nasa.gov/About/Acronyms.html.
by CDDIS_support_Lori
Fri Feb 14, 2020 10:07 am America/New_York
Forum: Questions/Comments
Question: satellite identifiers for SP3 orbit files
Replies: 1

Re: satellite identifiers for SP3 orbit files

The list of satellite identifiers for SP3 orbit files is available at URL http://cddis.gsfc.nasa.gov/Techniques/sp3c_satlist.html.
by CDDIS_support_Lori
Fri Feb 14, 2020 10:05 am America/New_York
Forum: Questions/Comments
Question: Timestamp on CDDIS data files
Replies: 1

Re: Timestamp on CDDIS data files

The timestamp of all files in the archive refers to local time at the CDDIS (EST or EDT).
by CDDIS_support_Lori
Thu Feb 13, 2020 4:01 pm America/New_York
Forum: Questions/Comments
Question: CDDIS data file names
Replies: 1

Re: CDDIS data file names

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...