Topic 1: Earth Science
Marine science
Atmospheric science
Solid state geophysics
Space Physics
Geochemistry
Geodesy, etc
Topic 2: Resource Exploration and Exploration
Water resources
Land resources
Mineral resources
Oil and gas resources
Resource exploration and prospecting
Measurement Engineering
Remote sensing/GIS/GPS, etc
Topic Three: Remote Sensing
Theories, techniques, and methods related to surveying, navigation, and oblique photography
Remote Sensing (RS)
Optical remote sensing
Microwave remote sensing
Cryosphere and hydrosphere
Geographic Information Science
Remote Sensing Information Engineering
Spatial database
Earth Monitoring and Mapping
Space Technology and Landscape Architecture
Classification and Data Mining Techniques
Image processing techniques 
Hyperspectral image processing
Remote sensing data fusion
Remote sensing data quality
Remote sensing mode analysis