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Landsat 7 International Ground Station (IGS) Documentation

The following documents describe the operational interface between the International Cooperators (ICs) and the Landsat 7 Project. Real time downlinks from Landsat 7 are sent to the stations operated by the ICs. The stations acquire, process, archive, and distribute the data.

Landsat Ground Ground Station (GS) Identifiers. LS-IC-04. Version 4.0. August 2007. .pdf (97.8 KB)

Landsat Ground Segment to International Ground Segment (IGS) Interface Control Document. LS-ICD-60. Version 1.0. April 2007. .pdf (722 KB)

Landsat 7 to International Ground Station (IGS) Interface Control Document. LS-ICD-29. Version 8.0. March 2006. .pdf (634 KB)

This document addresses the IGS interfaces with the Mission Operations Center (MOC), the Center for Earth Resources Observation and Science (EROS), and the satellite. With this issue of the documents, numbering of the versions has changed from letters to numbers - we have gone from Revision F to Version 7.

Version 7 of the IGS ICD has the following technical updates:

• DAAC interface changed to LAM interface
• EDC changed to EROS
• Receive Antenna Horizon Mask product deleted from MOC interface
• Name of NORAD Two-Line Element message changed to Two-Line Element message
• Conditions for delivery to stations of the Acquired Scenes Report (every scheduling run with requests for that station) and Contact Schedule Message (only if downlinks are scheduled for that station) corrected
• Note addedabout appending “FOT” to Admin message when sent from MOC
• Length in time added to definition of Interval (48 seconds to 14.4 minutes)
• Number of definitive ephemeris points included in definitive ephemeris product (from 3660-3661) corrected
• Field definitions in Acquired Scenes Report corrected
• Description for generation of LPS SLC-Off Browse Product added
• Bands used for LPS Browse product (5/4/3) corrected
• Physical media option from IGS-LAM interface removed
• Moved station identifier table from Appendix H to separate document: LS-PD-24, Landsat Ground Station Identifiers
• Merged-IC explanation addedto IPM appendix
• URL for IGS-related documents corrected(to landsat.usgs.gov/igsdocs.php)

If you would prefer a copy of the document with change bars noted, please email custserv@usgs.gov to request a copy.

Operations Agreement Between the International Ground Stations (IGSs) and Landsat 7. LS-OA-07. Version 2.0. April 2005. .pdf (241 kb)

This document addresses operational details for the interfaces between the IGS and the MOC and EROS. With this issue of the document, numbering of the versions has changed from letters to numbers – we have gone from Revision A to Version 2.0.

In Version 2 of the IGS Operations Agreement (OA), the following technical updates were made:

• DAAC interface changed to LAM interface
• Physical media option removed from IGS-LAM interface
• EDC changed to EROS
• Description of Backup MOC added
• Receive Antenna Horizon Mask product from MOC interface deleted
• Name of NORAD Two-Line Element message changed to Two-Line Element message
• Delivery schedule for IRV messages corrected
• Some action descriptions for FORMATS Product Report corrected
• Station identifier table moved from Section 3 to separate document: LS-PD-24, Landsat Ground Station Identifiers
• Conditions for delivery to stations of the Acquired Scenes Report (every scheduling run with requests from that station) and Contact Schedule Message (only if downlinks are scheduled for that station) corrected
• Option of using SSH version 1 for LAM password updates deleted
• Contact information in the appendices updated
• URL for IGS-related documents corrected (to landsat.usgs.gov/igsdocs.php)

If you would prefer a copy of the document with change bars noted, please email custserv@usgs.gov to request a copy.

Tutorial for IGS Priority/Service Request Map Editor (IPM) Online Tool (Version 3.1). The IPM is a tool that enables the IGS to submit priority maps and service request maps to the MOC for use during scheduling. The tutorial consists of five Powerpoint files.

Part A - Working with Priorities
Format available: Powerpoint - .ppt (3.1 MB)
This is an update to the one file previously posted at this site. It introduces the IPM tool display and functions, and explains how to use the IPM for assigning priorities over the Internet. This would replace sending the Priority (PRI) message to the MOC server or the Excel spreadsheet via e-mail.

Part B - Working with Requests
Format available: Powerpoint - .ppt (2.5 MB)
This is new. It explains how to use the IPM for making routine service requests over the Internet, instead of sending a REQ message to the MOC server.

Part C - Pop-Up Messages
Format available: Powerpoint - .ppt (1 MB)
This is new. It displays each of the pop-up message boxes that can occur during an IPM session and explains why it occurs and any action required on your part as a result of the message.

Part D - Geographic Display Capability
Format available: Powerpoint - .ppt (1.4 MB)
This is new. It explains how to use the geographic display capability that was implemented in September 2002.

Part E - Making a Manual Submission
Format available: Powerpoint - .ppt (1 MB)
This is new. It describes the new file -- the Priority/Service Request Mask (PSR) file -- that should be used to File Transfer Protocol (FTP) priority masks or service requests to the MOC server if you choose not to use the online IPM capability. It explains how to use the PSR file to submit priorities or requests, the validation reports returned from the MOC as a result of receiving the PSR file, and how to correct errors reported back to you.

If you have any questions about the files or about the use of the IPM, please contact the Mission Planners using our email.

Information on the Long Term Acquisition Plan (LTAP) and a copy of the Landsat 7 WRS Land Database can be obtained on the LTAP page.

Segmentation Gap-Filled Product Development - Segmentation Algorithm Selection. June 2006. Response to LTWG#15 action item #3. .pdf (10 KB)

This is a report on the comparison between the eCognition and NASA-GSFC segmentation methods that was done during the development of the segmentation gap-filled product. It is in response to an action item from the LTWG#15 meeting in Kiruna, Sweden.

Landsat Handy Dandy Acquisition Charts (Revision 9)

This Excel spreadsheet allows you to look up the calendar date on which a particular path will be followed by Landsat 7 (listed in blue) or by Landsat 5 (listed in red). It starts on May 27, 1999 and has been extended out to February 2009. A second chart, with larger type, is also available in this file that contains the path flow/calendar dates in 3.5 month chunks. The latest revision number for these charts is 9, dated January 2008. You can easily update the charts to extend further into the future.
Formats available: Excel - .xls (976 KB)

WRS Scene Center and Corner Points

The WRScornerPoints file- .xls (11.9 MB) lists the latitude and longitude for the scene center and four corners of each WRS-2 scene. This includes the ascending rows. Positive latitude is North, negative latitude is South. Positive longitude is East, negative longitude is West. It is sorted in Path/Row order. - Also see our Path / Row to Lat / Long Converter.

One Year of WRS Sun Elevation Angles
The following elevation files contain sun angle information for every WRS row, for every day of a year. Specifics regarding file structure:

1. The file name is structured as L7yyyydddWRSSUN.S00, where yyyy = four-digit year and ddd = 3-digit day of year.
2. Each file contains sun angle values for seven days, starting with the day in the file name, at 12:00:00 Greenwich Mean Time (GMT) of each day.
3. The first two lines in the file identify the fields "start" and "stop," which are the seven days covered by this report.
4. The third line identifies the fields contained in the rest of the report: WRS row, followed by seven sun angle values.
5. Sun angle values are given for rows 1 through 248.
6. The file is comma delimited.
7. Sun angles are specified to an accuracy of a tenth of a degree.
8. Sometimes there is overlap between files (especially in 1999); sometimes there is not.

Improved Reduced-Resolution Satellite Imagery, The Aerospace Corporation. Format available : - .pdf (40 KB)

Landsat Metadata Description Document (LMDD). LS-DIR-05. Version 2.0. - .xls (1.09 MB)