Project's information

Project's title Designing and building the airborne reflective spectrometer
Research hosting institution Vietnam Space Technology Institute
Project leader’s name Tran Minh Van
Project duration 01/01/2009 - 01/01/2011
Project’s budget 550.000.000 VND
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Goal and objectives of the project

a. Design and build an airborne reflective spectrometer

  • Study to build the optical part of the spectrometer
  • Designing and building the electronics parts of the spectrometer including: the signal amplifier, photo - electric converter, analog to digital converter, system controller, data receiver, high-speed computer interface
  • Development of  software to receive and storage data in computer
  • Development of data processing software
  • Development of software to control measurement process
  • Testing and calibration of the spectrometer

b. Development of the natural object spectral library using visible and near-infrared spectrometer

  • Testing on selected objects of vegetation, bare soil and water body, analyzing the variation to establish the measurement and data processing procedure and compile the field measurement form, suitable for above natural object types
  • Conducting field measurements with detailed description of typical natural objects using above form
  • Processing the measurement data, designing and constructing the spectral library
  • Building an website to access the spectral library, linked with Space Technology Institute website
  • Analyzing spectral characteristics of natural objects to select spectral bands for satellite remote sensing sensors 
Main results
  •  Airborne reflective spectrometer
  • Spectrometer design document
  • Software
  • User’s guide document
  • Testing measurement data
  • Spectral database, which can be accessed in internet
  • Recommendation of spectral bands for Vietnam satellite earth observing sensor
Products of the project
  • Technological products (describe in details: technical characteristics, place): 

The airborne spectrometer with following specifications:
+ Spectral range: 400-1000nm
+ Number of spectral bands: 60
+ Spectral bandwidth: 10nm
+ Integration time: 50ms
+ Field of view: 4o
+ Sensitivity: 5 x 10-10 Wcm-2nm-1sr-1
+ Automatic dark current compensation
+ Detector: Hamanatsu S3903 with S/N 2000:1
+ Dimension: 35 x 14.5 x 30 cm
+ Weight: 7kg
+ Power supply: rechargeable battery 12V
+ Highly reliable, can be operated independently or controlled by computer, suitable for used in airplane
+ Accompanied with software for receiving and storage data in computer
+ Data processing software with following functions:

o Calibration spectral band wave-length
o Uniform distribution of energy between spectral bands
o Calibration of output data according to energy
o Display spectral curve
o Calculating the reflectance coefficients from measurement data
o Geo-reference measured object using GPS
o Ground spatial resolution: 2πtg2o.h (h-altitude of airplane)

The spectrometer is now kept at the Department of Satellite Technology Research and Development of the  Space Technology Institute

  • Other products (if applicable): The spectral library of natural objects in a website, linked with the Space Technology Institute website
Research region

Remote Sensing Application Department and Department of Remote Sensing, GIS, GPS under Space Technology Institute


Research, designing and building of the space technology in general and remote sensing equipments in particular are essential for space technology development. Research, designing and building of the spectrometer used for remote sensing purpose could contribute much in improvement of the space technology infrastructure as well as manpower in this field and therefore should be maintained and further developed.

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