Landsat TM (4–5) satellites were designed to extend the spectral coverage of Landsat MSS to the Shortwave (SWIR) section of the EM spectrum, while improving the spatial resolution to 30 m. A thermal infrared (TIR) band was also introduced with a spatial resolution of 120 m. Landsat 4 and 5 carried Multi-Spectral Scanner (MSS) and Thematic Mapper (TM) imaging sensors. This gallery includes all Landsat images published on the Earth Observatory, Visible Earth, and Landsat Science web sites from all seven Landsat satellites (Landsats 1-8, Landsat 6 failed to achieve orbit). Spectral (what colors – bands) 3. Like previous missions, the Landsat 4 satellite orbited the the Earth in a sun-synchronous, near-polar orbit, but flew at a lower altitude of 705 km (438 mi), inclined at … The imagery varies in spatial resolution (10‒500m/pixel), revisit periods (2‒16 days) and spectral bands contained (4 to 12 bands). This new instrument was known as the Thematic Mapper (TM). 80 m resolution for Landsat-1 to -5) and later Thematic Mapper (TM), enhanced thematic mapper (ETM) and ETM+ (mostly 30 m resolution, for Landsat-4 to -7). U.S. Landsat 4-8 Analysis Ready Data (ARD) V1 U.S. Landsat Analysis Ready Data (ARD) are consistently processed to the highest scientific standards and level of processing required for direct use in monitoring and assessing landscape change. Temporal Resolution (revisit days) 18 (Landsat 1,2,3) 16 16 16 Comparison of Landsat Sensors Resolutions of Remote Sensing 1. ... e.g. The Landsat satellites offer high resolution in space (30 × 30m pixels) and data of 7 spectral bands which are suitable for many applications. Landsat 4… The Landsat satellite record stretches from 1972 to the present. TM operates in seven wavelength bands, out of which six are in the solar reflection region and one in thermal-IR region. The acquired images were transmitted to Earth using radio waves.
The Landsat Thermal Infra-Red Scanner (TIRS) provides two more narrow spectral bands in the Thermal (originally covered by a single band in the previous TM and ETM+ sensors) and is a QWIP (Quantum Well Infra-Red Photodetector) based instrument intended to … Temporal (time of day/season/year) 4. • Landsat 4 TM: July 1982 to December 1993 • Landsat 5 TM: March 1984 to May 2012 • Landsat 7 ETM+: April 1999 to within one week of present 3. The MSS covered 0.5 to 12.6 ต m and provided 80 m resolution with a 185 km swath width. Band 8 (thermal infrared ) was only present on the Landsat 3 satellite and had a spatial resolution of 240m x 240m. The TM is an advanced multispectral scanner used in Landsat 4 & 5 missions. A Landsat 4 or 5 TM scene has an instantaneous field of view (IFOV) of 30 meters by 30 meters (900 square meters) in bands 1 through 5 and band 7, and an IFOV of 120 meters by 120 meters (14,400 square meters) on the ground in band 6. Landsat 4-5 TM data cannot be processed to Surface Reflectance between specific dates because some auxiliary data required for Surface Reflectance processing are missing. In addition to the Multispectral Scanner (MSS) instrument, Landsat 4 (and Landsat 5) carried a sensor with improved spectral and spatial resolution, i.e., the new satellites could see a wider (and more scientifically-tailored) portion of the electromagnetic spectrum and could see the ground in greater detail. These bands have a spatial resolution of 79m x 79m. The bands were relabeled to 1, 2, 3, and 4 on Landsat 4 and 5 satellites. Sentinel 2 data, Landsat 8 OLI and TIRS, Landsat ETM+ data, MODIS data coming from operational satellites is regularly updated and immediately available for viewing, analysis or download. Two of the bands are in the visible range while 2 of them are in the reflective near-infrared. Radiometric (color depth) Spatial (what area and how detailed) 2. The coarser resolution images were constructed by downscaling the original 10 m x 10 m image and sharpening the resulting image a little bit. The Landsat satellites were equipped with digital electromagnetic sensors: Multi-Spectral Scanner (MSS) since the beginning of the programme (ca. TM provided 7 bands of coverage and the MSS had 4 bands.