GFZ German research centre for geo sciences

Hyperspectral Sensors

In contrast to multispectral sensors acquiring the reflected radiance in broad bands, hyperspectral sensors record the radiance in many narrow contiguous bands. These bands are spread over the atmospheric windows and cover the entire reflective region of the electromagnetic spectrum, i.e. the visible and near infrared (VIS/NIR) and the short wave infrared (SWIR). Some hyperspectral sensors additionally have multispectral bands in the thermal infrared regions (TIR).

Presently, a number of airborne imaging spectrometers has been providing data of successively increasing quality. Acronyms of those sensors are AVIRIS, CASI, DAIS 7915, MIVIS, HYMAP etc. Spaceborne sensors for terrestrial remote sensing are expected to be operating soon.

Our research activities are primarily focused on the analysis of the DAIS 7915, CASI and the HYMAP sensor data. DAIS 7915 was built by GER Corp. and are operated by DLR (German Aerospace Research Establishment). The DLR provides further details on the DAIS 7915 and ITRES on the CASI . The HYMAP Sensor is operated by the Integrated Spectronics Pty Ltd. (ISPL), Australia. In Table 1 the technical specifications of the above mentioned sensors are displayed.

 

Table 1: Specifications of AVIRIS, CASI, DAIS 7915, HYMAP and MIVIS

SensorSpectral Coverage (nm)Number of BandsBand Width (nm)
AVIRIS400 - 250022410.0
  288 
CASI400-1000bis zu 192.2
  programmierbar 
 498 - 10103216.0
 1500 - 18008100.0
DAIS 79151970 - 24503215.0
 3000 - 500012000.0
 8700 - 123006600.0
HYMAP400 - 250012815-20
 400 - 8002020.0
MIVIS1100 - 1500850.0
 1900 - 2500649
 8200 - 127001035 - 45
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