The radiometer is a portable battery operated instrument

consisting of two main parts: optical head and processing unit. The optical head is equipped 6 channels between 0.4 and 2.5 micrometer

which may match with MSS

TM bands

and others. It is easy to change the FOV and passband filter of channels in field conditions by modular design. The processing unit records and processes the data from the optical head

it’s foundmental component being a microprocessor. The system is adaptable to helicopter

truck or tripod platforms

it is also suitable for hand-hold operation.The general properties of the system are:1. comparatively inexpensive to acquire

maintain and operate

2. simple to operate

calibrate and service

3. rapid measurement ability

4. complet with data handing

processing hardware and softwre.Some results of application are shown

which has proved that the system can be utilized by many researchers to obtain large numbers of accurate

calibrated spectral measurements for remote sensing.