EO-1 User Guide v. 2.3 - USGS

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The calculation will take several minutes.You now have an atmospherically corrected reflectance image to which youcan apply spectral end members for mapping.OR32
IIb ATMOSPHERICALLY CORRECT OR REMOVE ENVELOPEFROM HYPERION RADIANCE DATA TO CREATE REFLECTANCEDATA USING ACORN.The URL for Research Systems to order ACORN and its manual ishttp://www.aigllc.com or http://www.aigllc.com/acorn/intro.aspThe following instructions are for the “stand alone” mode of ACORN 4.0By Anne Gravante, Analytical Geophysics and Imaging, LLC., November,2002.For Early Hyperion DataOn Hyperion, the ACORN offsets are currently all zero. The ACORN gainsto be used on a particular dataset depend on the processing parameters usedto produce the Level-1 data. Early data apparently needed to be multipliedby 100 across the board to get to radiance, corresponding to an ACORN gainof 0.01. Later (Level 1A) data use multipliers of 40 for the VNIR and 80 forthe SWIR - this corresponds to gain factors of .025 and .0125 respectively.The Level 1A HDF header now contains the values of the actual multipliers,so check there for the appropriate numbers for your specific dataset.Get correct gain values from HDF Dataset attributes on L1 file by choosingENVI Basic Tools->Data Specific Utilities->HDF Dataset Attributes.You should see something like:"Attribute 1-20: VNIR Calibration Multiplier w/m^2/sr/micron* 40""Attribute 1-21: SWIR Calibration Multiplier w/m^2/sr/micron* 80"at the end of the HDF listing. The appropriate ACORN gain factos in theabove case are: 1/40 = .025 and 1/80 = .0125For Later Hyperion Data (<strong>USGS</strong> HDF Level 1B)For general questions about Hyperion, you can direct users to the <strong>EO</strong>-1Homepage at: http://eo1.gsfc.nasa.gov/miscPages/home.htmladditional specific information (including examples) can be found33
Page 2 and 3: EO-1 User GuideVersion 2.3July 15,
Page 4: EO-1 Introduction and FAQGeneralWha
Page 7 and 8: Hyperion Introduction and FAQWhat a
Page 9 and 10: Comparisons of the data show that t
Page 11 and 12: 1) Hyperspectral mapping with spect
Page 13: Reference spectra of the geology th
Page 16 and 17: MetadataThe data contained in this
Page 18 and 19: I. CONVERTING HYPERION LEVEL 1 B DA
Page 20 and 21: Select filename, Select Spectral Su
Page 22 and 23: II ATMOSPHERICALLY CORRECT OR REMOV
Page 24 and 25: Check the image processing by displ
Page 26 and 27: Click OK.Click Apply.The calculatio
Page 28 and 29: Step 3 for USGS HDF format Hyperion
Page 30 and 31: Select Basic Tools / Calibration Ut
Page 34 and 35: at: http://eo1.gsfc.nasa.gov/miscPa
Page 36 and 37: Beck has included an ACORN 4.0 stan
Page 38 and 39: ACORN version number: number4.00Mod
Page 40 and 41: Spectrum UC.097 (White sandstone fr
Page 42 and 43: III PERFORMING MAPPING STEPSa) by c
Page 44 and 45: Click on the Output Class File Name
Page 46 and 47: composition of the crystal, it dete
Page 48: Individual Alunite CrystalsAlunite
Page 51 and 52: SAM from spectral library end membe
Page 53 and 54: ) by comparison with end members fr
Page 55 and 56: Enter Output File Name and Director
Page 57 and 58: SAM from ROI end members Hyperion i
Page 59 and 60: egions of interest technique.V ADDI
Page 61 and 62: Quick Start Guide for the Analytica
Page 63 and 64: measure its own noise to subtract f
Page 65 and 66: floppy disk.To import the measured
Page 67 and 68: Converting Hyperion Data to Reflect
Page 69 and 70: Advanced Land Imager (ALI)ALI and L
Page 71 and 72: egion of 37 kilometers in width. Pl
Page 73 and 74: Instructions for the Import of EO-1

EO-1 User Guide v. 2.3 - USGS

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