Download EO-1/ Hyperion Science Data User's Guide

EO-1/Hyperion Science Data User’s Guide
HYP.TO.01.077
TABLE OF CONTENTS
1
INTRODUCTION .................................................................................................................................................7
1.1
1.2
1.3
1.4
1.5
1.6
2
HYPERION DATA CUBE QUICK START ....................................................................................................16
2.1
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.3
2.4
3
DATA CUBE STRUCTURE ..............................................................................................................................16
SUGGESTED BAND COMBINATIONS FOR IMAGES ..........................................................................................16
VNIR Band 40 or SWIR Band 93 ............................................................................................................16
VNIR: visible RGB ..................................................................................................................................17
VNIR: vegetation RGB ............................................................................................................................18
SWIR: RGB .............................................................................................................................................18
INTRODUCTION TO THE HYPERION SPECTRA ................................................................................................19
AUXILIARY PLATFORM NOTES .....................................................................................................................22
HYPERION DATA COLLECTION, FLOW AND PROCESSING...............................................................24
3.1
3.2
3.3
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.5
3.5.1
3.5.2
3.5.3
4
DOCUMENT SCOPE .........................................................................................................................................7
EO-1/ MISSION OVERVIEW ............................................................................................................................8
HYPERION INSTRUMENT OVERVIEW ...............................................................................................................9
SUMMARY OF HYPERION PERFORMANCE CHARACTERISTICS .......................................................................11
OVERVIEW OF HYPERION DATA COLLECTION AND DATA FLOW ..................................................................13
HYPERION CONTACT LIST ............................................................................................................................15
HYPERION DATA COLLECTION EVENT SEQUENCE........................................................................................24
TYPES OF HYPERION DATA COLLECTION EVENTS ........................................................................................25
DATA FLOW FROM THE SPACECRAFT TO THE USER ......................................................................................25
DESCRIPTION OF THE HYPERION LEVEL 0 DATA PROCESSING......................................................................26
Hyperion Level 0 Processing ..................................................................................................................27
Hyperion Level 0 Output File Naming Convention.................................................................................27
Ancillary HDF Data Files.......................................................................................................................28
Explanation of SDS Attributes in Level 0 product - optional..................................................................29
DESCRIPTION OF THE HYPERION LEVEL 1 DATA PROCESSING......................................................................32
Hyperion Level 1 Processing ..................................................................................................................32
Description of Quality Assurance Form .................................................................................................37
Description of Sample Metadata Files - optional ...................................................................................38
HYPERION DATA CUBE DETAILS...............................................................................................................44
4.1
4.1.1
4.1.2
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.3
4.3.1
4.3.2
4.3.3
4.4
4.4.1
4.4.2
4.4.3
4.5
4.5.1
4.5.2
4.5.3
ABSOLUTE RADIOMETRIC CALIBRATION ......................................................................................................44
Derivation of the Absolute Radiometric Calibration File.......................................................................44
Verification of the Absolute Radiometric Calibration ............................................................................44
RADIOMETRIC CALIBRATION – ADVANCED TOPICS .....................................................................................45
Proper operation temperature of the SWIR ............................................................................................45
Pixel-to-Pixel Improvements...................................................................................................................46
Optical Scatter ........................................................................................................................................46
Saturation................................................................................................................................................47
Level 1 Scaling Factors to Retain Precision ...........................................................................................47
SPECTRAL CALIBRATION ..............................................................................................................................48
Derivation of Spectral Calibration files..................................................................................................48
Verification of Spectral Calibration Files...............................................................................................52
Spectral Wavelengths Selected for Absolute Radiometric Calibration ...................................................52
SPECTRAL CALIBRATION – ADVANCED TOPICS............................................................................................52
Quick Look Spectral wavelength in the header file.................................................................................52
Hyperion Quick Spectral Comparisons with ALI and Landsat ...............................................................53
Top of the Atmosphere Spectral Signature and Band Selection for Analysis..........................................53
VNIR – SWIR SPATIAL ALIGNMENT- ADVANCED TOPICS ..........................................................................56
Ground sample distance..........................................................................................................................56
VNIR and SWIR spatial co-registration of spectral channels .................................................................56
Co-registration between the VNIR and SWIR .........................................................................................56
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