Spacecraft position vectors and individual scan parameters for the IRAS mission.

This data presented with this data set includes: (a) The position of the satellite in its orbit about the Earth at 200 second intervals in heliocentric ecliptic rectangular coordinates (B1950), where the X axis points to the First Point of Ares. In addition an Earth ephemeris is also included, which was generated by Miles Standish at JPL using the information that was available in 1983 to best approximate the knowledge of the Earth's position that was used in the reduction of the IRAS data. Finally, the geocentric position of the satellite is calculated using the above information. (b) The IRAS Scan History File describes the pointing geometry and length of each survey-mode scan (by SOP OBS) over the entire mission.

This data presented with this data set includes: (a) The position of the satellite in its orbit about the Earth at 200 second intervals in heliocentric ecliptic rectangular coordinates (B1950), where the X axis points to the First Point of Ares. In addition an Earth ephemeris is also included, which was generated by Miles Standish at JPL using the information that was available in 1983 to best approximate the knowledge of the Earth's position that was used in the reduction of the IRAS data. Finally, the geocentric position of the satellite is calculated using the above information. (b) The IRAS Scan History File describes the pointing geometry and length of each survey-mode scan (by SOP OBS) over the entire mission.

This data presented with this data set includes: (a) The IRAS Detector File which provides for each detector of the focal plane array its operational status, associated filter, location, dimension, sterradiance, and readout time offset; (b) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 1 (12 microns); (c) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 2 (25 microns); (d) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 3 (60 microns); (e) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 4 (100 microns).

This data presented with this data set includes: (a) The IRAS Detector File which provides for each detector of the focal plane array its operational status, associated filter, location, dimension, sterradiance, and readout time offset; (b) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 1 (12 microns); (c) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 2 (25 microns); (d) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 3 (60 microns); (e) The transmission and response values given in this table are to energy/wavelength and represent averages over all of the IRAS detectors of Band 4 (100 microns).

The Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSEI), using the Spitzer Space Telescope Infrared Array Camera (IRAC) surveyed approximately 220 square degrees of the Galactic plane, covering a latitude range of ±1◦, and a longitude range of |l| =10◦−65◦, plus the Observation Strategy Validation (OSV) region at l=284◦. The observations consisted of two 1.2 second integrations at each position, for a total of over 77,000 pointings and ∼310,000 IRAC frames in 400 hours total survey time. The survey consists of a point source Catalog, a point source Archive, and mosaicked images.The GLIMPSEI Archive (GLMIA or the “Archive”) consists of point sources with a signal- to-noise > 5 in at least one band and less stringent selection critera than the Catalog. The photometric uncertainty is typically < 0.3 mag. The GLIMPSEI Catalog is a subset of the Archive, but note that the entries for a particular source might not be the same due to additional nulling of magnitudes in the Catalog because of the more stringent requirements.

The Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (GLIMPSEI), using the Spitzer Space Telescope Infrared Array Camera (IRAC) surveyed approximately 220 square degrees of the Galactic plane, covering a latitude range of ±1◦, and a longitude range of |l| =10◦−65◦, plus the Observation Strategy Validation (OSV) region at l=284◦. The observations consisted of two 1.2 second integrations at each position, for a total of over 77,000 pointings and ∼310,000 IRAC frames in 400 hours total survey time. The survey consists of a point source Catalog, a point source Archive, and mosaicked images.The GLIMPSEI Catalog (GLMIC, or the “Catalog”) consists of point sources whose selection criteria are determined by the requirement that the reliability be ≥99.5%. There is a range of limiting magnitudes depending on whether the source is in a sparsely populated or low background region or in a region of high diffuse background or high source density. The photometric uncertainty is typically < 0.2 mag.

'Spaceborne Imaging Radar-C (SIR-C) was part of an imaging radar system that was flown on board two Space Shuttle flights (9 - 20 April, 1994 and 30 September - 11 October, 1994). The U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center distributes the C-band (5.8 cm) and L-band (23.5 cm) Survey Data. A total of about 50 hours of data, corresponding to roughly 50 million square kilometers of ground coverage, were collected during each mission. The ground swath width varies from 15 to 90 kilometers depending on the imaging mode and incidence angles of the radar beams. All science data were processed into Survey products. The Survey product is intended as a \"quick look\" browsing tool for viewing the areas imaged by SIR-C. This product is not designed to be used for quantitative scientific analysis. Survey Data consists of a frame image of a data segment, which represents a subset of the data swath. Resolution is approximately 100 meters, processed to a 50-meter pixel spacing. Additional information on SIR-C is available at: http://southport.jpl.nasa.gov.'

The Shuttle Radar Topography Mission (SRTM) successfully collected Interferometric Synthetic Aperture Radar (IFSAR) data over 80 percent of the landmass of the Earth between 60 degrees North and 56 degrees South latitudes in February 2000. The mission was co-sponsored by the National Aeronautics and Space Administration (NASA) and National Geospatial-Intelligence Agency (NGA). NASA's Jet Propulsion Laboratory (JPL) performed preliminary processing of SRTM data and forwarded partially finished data directly to NGA for finishing by NGA's contractors and subsequent monthly deliveries to the NGA Digital Products Data Wharehouse (DPDW). All the data products delivered by the contractors conform to the NGA SRTM products and the NGA Digital Terrain Elevation Data (DTED) to the Earth Resources Observation & Science (EROS) Center. The DPDW ingests the SRTM data products, checks them for formatting errors, loads the SRTM DTED into the NGA data distribution system, and ships the public domain SRTM DTED to the U.S. Geological Survey (USGS) Earth Resources Observation & Science (EROS) Center. Two resolutions of finished grade SRTM data are available through EarthExplorer from the collection held in the USGS EROS archive: 1 arc-second (approximately 30-meter) high resolution elevation data are only available for the United States. 3 arc-second (approximately 90-meter) medium resolution elevation data are available for global coverage. The 3 arc-second data were resampled using cubic convolution interpolation for regions between 60° north and 56° south latitude. [Summary provided by the USGS.]