In disaster rescue, emergency response and other occasions, traditional aerial photogrammetry is difficult to meet real-time monitoring and dynamic tracking demands. To achieve the live service of video geo-information, a system is designed and realized—an unmanned helicopter equipped with video sensor, POS, and high-band radio. This paper briefly introduced the concept and design of the system. The workflow of video geo-information live service is listed. Related experiments and some products are shown. In the end, the conclusion and outlook is given.
Considering the aging and radiation recession of satellite remote senors on-orbit, regular in-orbit calibration is
essential to updating the calibration parameters and improving the data’s quantitative application level. This
paper reviews the existing on-orbit radiometric calibration methods, and introduces famous radiation
calibration fields around the world. Simultaneous ground measurement was carried out for the calibration of
visible-near infrared bands of HJ-1B satellite. A comparison was made between the results of the experiment
and the calibration parameters released along with environmental satellite images, which represents desirable
validity and applicability. The calibration result determined the sensor recession and aging in in-orbit
operation. Finally, reasonable proposals for the quantitative application of satellite data are given.