The Landsat Project is the longest running enterprise for acquisition of mid resolution imagery of the Earth from space. Launched on 15 April 1999, Landsat 7 has the Enhanced Thematic Mapper Plus (ETM+) sensor.
This sensor has the same 7 TM spectral bands as its predecessor but has an added panchromatic band with 15 metre resolution and a higher resolution thermal band of 60 metres. The ETM+ sensor also has a five percent absolute radiometric calibration.
Features and Benefits
- Provides consistent change detection multispectral imagery from the longest running history of land remote sensing satellites.
- Absolute calibration from the ETM+ serving as an on-orbit standard for cross-calibration.
- Panchromatic band with 15m spatial resolution.
- On-board, full aperture, 5% absolute radiometric calibration.
- Thermal infrared channel with 60m spatial resolution.
- On-board data recorder.
Technical Specifications
Specification | Details |
Resolution | Pan 15m, TM 30m |
Nominal Swath Width | 185km |
Bands | Enhanced Thematic Mapper Plus (ETM+) Landsat 7’s ETM+ sensor replicates the capabilities of the highly successful Thematic Mapper instruments on Landsat 4 and 5 but also includes new features that make it a more versatile and efficient instrument for global change studies, land cover monitoring/ assessment and large area mapping. The primary features are a panchromatic band with 15m spatial resolution; onboard, full aperture, 5% absolute radiometric calibration; and a thermal infrared channel with 60m spatial resolution. |
Largest Scale | 1:40,000 – Landsat 7 Pan-sharpened ETM+ |
Bit depth | 8 bits |
Programmable | No |
Stereo Available | No |