LANDSAT 7 DATA POLICY PLAN

October 31, 1994


Click here for most recent draft
of Landsat 7 Data Policy.


Introduction
Section 105 of Public Law (P.L.)102-555, The Land Remote Sensing Policy Act of 1992, specifies, "The Landsat Program Management (LPM), in consultation with other appropriate United States Government agencies, shall develop a data policy for Landsat 7...", and describes goals for the policy. This document, in accordance with the provision of the law, establishes a data policy plan for Landsat 7 that covers the acquisition, processing, archival, distribution and pricing policy for Landsat 7 data. Roles and responsibilities for Landsat 7 system development and operations are contained in the Management Plan for the Landsat Program.

As required by P.L. 102-555, this Data Policy Plan is designed to achieve the following:

The Landsat 7 system will be comprised of a spacecraft carrying an Enhanced Thematic Mapper Plus (ETM+) instrument and a ground segment consisting of mission operations, data capture, ground processing, data archiving, and data product distribution elements. The ETM+ is a nadir-pointing, eight spectral band instrument designed to provide data continuity with previous Landsats.

Acquisition
The data acquisition schedule will be driven by the mission goal of creating and periodically updating a global archive of sun-lit, substantially cloud-free images of land areas. However, responding to spacecraft and instrument emergencies will take precedence over all other acquisitions. Furthermore, the Landsat operator will modify routine acquisition schedules, if necessary, to respond to crisis situations, including national security or environmental emergencies, and time-critical observations, in accordance with policy guidelines established by the Landsat Coordinating Group (LCG) acting on behalf of Landsat Program Management.

The primary U.S. Government (USG) ground station will be located at the US Geological Survey's EROS Data Center (EDC) at Sioux Falls, South Dakota. This ground station will provide the capability to capture both real-time and recorded data via direct transmission from Landsat 7. In addition, the Landsat 7 system will be capable of transmitting data in real-time to other ground stations which may be established by both USG and non-USG users.

USG ground stations will operate according to the data acquisition priorities defined in this document, while non-USG stations will receive data upon request and limited by the allocation of spacecraft steerable antenna and transmitter assets for providing direct transmission data. These direct downlink resources will be scheduled in a balanced and equitable manner consistent with the achievement of the global archive mission goal.

The Landsat 7 operator will develop a standard ground station agreement which each non-USG operator must sign to be authorized to receive Landsat 7 data. This agreement will include conditions such as: provisions for acquisition scheduling and availability of the direct downlink; the use of non- USG ground stations as contingency backups or supplements for USG data acquisition; the reception, archiving and cataloging of remotely received data; the availability of these data; the technical services available to the ground stations; and the fees associated with access to data.

For non-USG ground stations, the Landsat 7 operator will endeavor to provide all requested coverage with the ETM+ sensor within the coverage circle of authorized ground stations, within the limits of the Landsat 7 system's resources. Specific requirements and arrangements regarding international ground stations (i.e., non-USG ground stations operated outside the United States) will be the subject of individual agreements between each international ground station and the Landsat 7 operator.

Processing
All ETM+ data acquired by the Landsat 7 ground system will be processed routinely to Level OR (see Attachment 1 for processing definitions) by the Landsat 7 Processing System (LPS) located at EDC. The LPS will also generate metadata and browse files to facilitate interactive user inquiry and product ordering. The EOSDIS Land Processes Distributed Active Archive Center (LPDAAC) at EDC will format image data into standard Level OR products and output the data on defined, standard media. The LPDAAC will provide user access to metadata and browse files. A limited number of data sets will be processed to Level 1 by the Image Assessment System for nonŠ commercial use to support image quality assessment activities.

Data processing beyond the Level OR product and browse file offered by the Landsat 7 system (i.e., processing to Level 1 and value-added enhancements and products) will be the responsibility of the users and will be accomplished with user -owned capabilities or those of any available supplier.

Archival
EDC will archive Landsat 7 data through the LPDAAC (nearŠterm archive) and the NSLRSDA (longŠterm archive). Included in the archive will be, at a minimum, all Landsat mission (or image) data acquired and processed through the LPS at EDC, and metadata and browse files from the LPS and the international ground stations.

Distribution
The fundamental concept in the Landsat 7 data distribution policy is non- exclusivity. The LPDAAC and the NSLRSDA will provide standard services associated with distribution of Level OR data. Access to Level OR data will be provided on a non-discriminatory basis to any requester within the technical limitations of the system. Although the USG retains ownership and all rights to the Level OR data, there will be no restrictions imposed by the USG on subsequent use, sale, or redistribution of data from Landsat 7

Landsat 7 data will be available in a defined standard product format as full resolution Level OR data. Data will be available on physical media and via electronic transfer. If a requester desires data in other forms and formats, the requester will be expected to use the standard product to produce those forms and formats, or procure the desired formatting or processing services from the private sector.

Pricing
Consistent with P.L. 102-555, Landsat data will be provided to all requesters on a non-discriminatory basis at the "cost of fulfilling user requests" (COFUR). COFUR is defined in P.L. 102-555 as "the incremental costs associated with providing product generation, reproduction, and distribution of unenhanced data in response to user requests and shall not include any acquisition, amortization, or depreciation of capital assets originally paid for by the United States Government or other costs not specifically attributable to fulfilling user requests."

Data prices, and/or fees, will be formulated based on the terms in P.L. 102-555 and applicable government regulations. The cost of data will take into account product generation costs, the output medium, and means of distribution, e.g., routine mail versus express delivery. A price list based on the incremental costs of these factors will be published annually, prior to the start of each fiscal year. All users will be charged the standard price for the products/services provided.




Attachment

Landsat 7 Processing Definitions


Level 0R
Reformatted instrument data, corresponding to an interval (instrument on/off) or sub-interval, that are un-rectified. The product is reformatted which involves fixed and pre-defined integer pixel shifts. Reformatting for ETM+ includes: 1) reversing the order of the reverse scan data, 2) aligning the staggered detectors, 3) aligning the spectral bands, 4) replicating the LWIR data, and 5) nominal alignment of the forward and reverse scans. Attitude and spacecraft ephemeris, radiometric calibration data and quality data are also included. All manipulations are reversible.

Metadata
Descriptive information pertaining to the Landsat 7 data sets, including such information as location and acquisition date, compiled for Level OR ETM+ data and available through the EOSDIS user interface.

Browse
A lower resolution image for determining the geographical coverage, information content and image quality of Level OR ETM+ data available through the EOSDIS user interface.

Level 1[Responsibility of the users]
Geometrically and radiometrically corrected Level OR data. Geometrically corrected for instrument and spatial errors, resampled using map projection, systematic precision with terrain corrections, and payload correction data, using ground control processing. The geometric and radiometric correction is not reversible.





APPROVED:



________signed___________________		___1/9/95_______
					
Dr. Gordon P. Eaton						Date
Director,					
U.S. Geological Survey
Department of the Interior




________signed___________________		___11/18/94______
					
Mr. Robert S. Winokur						Date
Assistant Administrator for
Satellite and Information Services
National Oceanic and Atmospheric Administration
Department of Commerce




________signed___________________		___4/20/95______
						
Dr. Charles F. Kennel						Date
Associate Administrator,
Office of Mission to Planet Earth
National Aeronautics and Space Administration				


RETURN, OR GO, TO:

Table of Contents Landsat Program summary


(END)