Thematic Mapper (TM)

Instrument

blue arrow Instrument Overview

The Thematic Mapper (TM) is a multispectral scanning radiometer operating in the visible and Infra-Red regions of the Electromagnetic Spectrum that was carried on board the Landsat 4 and 5 satellites.

TM is a whiskbroom instrument designed and built by SBRC (Santa Barbara Research Centre) of Hughes Aircraft Company in Goleta, CA. TM is regarded as a second generation imager for monitoring Earth's resources with considerably improved spectral and spatial resolutions over those of the Multi Spectral Scanner which was used aboard the Landsat 1 to 5 satellites. The TM sensors provided nearly continuous coverage from July 1982 to June 2013.

TM instrument parameters
Swath Width 185 km
Resolution 30 m for VIS, NIR, SWIR

120 m for TIR, no onboard recording

 

TM Band Information

Band No. Bandwidth (µm) Detectors
1 0.45-0.52 (VIS, blue) Coastal water mapping, soil/vegetation differentiation, deciduous/coniferous differentiation, chlorophyll absorption
2 0.52-0.60 (VIS, green) Green reflectance, peak of healthy vegetation, plant vigor
3 0.63-0.69 (VIS, red) Chlorophyll absorption, plant type discrimination
4 0.76-0.90 (NIR) Biomass surveys, water body delineation
5 1.55-1.75 (SWIR) Vegetation moisture measurement, snow/cloud differentiation
7 2.08-2.35 (SWIR) Hydrothermal mapping, geology
6 10.4-12.5 (TIR) Plant heat stress, thermal mapping, soil mapping

 

Sensor Modes

Landsat operated in the SAM (Scan Angle Monitor) Mode for nominal routine operations. On 1 March 2002, Landsat 5 TM was switched to the 'backup' BUMPER mode to help correct issues associated with the end of an instruments lifetime. More information on this mode-switch is available in the Monthly update from April 2002.

blue arrow Data

blue arrow DATA DOWNLOAD

Download data from Landsat-4 and 5 TM dataset through the ESA TPM LDS online dissemination System. The data is freely available to registered EO-SSO users.

blue arrow DATA DESCRIPTION

ESA offers to registered user the access through the Online Dissemination server to the following data collection

 

Further information is available on the Thematic Mapper product information.

blue arrow DATA TOOLS

Landsat 5 data can be visualised through the HEDAVI (HEritage DAta Visualisation) service. HEDAVI allows you to discover a wealth of heritage data from ERS and Envisat missions, as well as from Landsat 5 and 7, two important heritage Third Party Missions, through ESA's Long Term Data Preservation programme.

Read more

blue arrow Processor Releases

Read more about the processor releases for TM.

blue arrow Cal/Val

The goal of TM calibration and validation activities was to verify the accuracy and quality of data the instrument acquired.

blue arrow Quality Control Reports

Quality Control is monitoring routinely the status of the spacecraft (payload and platform) and to check if the derived products meet the quality requirements along mission life-time.