ALOS Data Users Handbook

More documents

Recommendations

Info

Section 3 Outline of ALOS Satellite SystemTotal approx. 30,000 pixels (Nadir : equivalent to approx. 70km)approx. 40,000 pixels (Forward, Backward)Electrical extraction of 29,184 pixelsDivide into 4864 pixels x 6 systemsCCD LayoutSatellite FlightDirectionMissionTelemetryTime106.7Mbps x 6chto Data Compression systemCompresseddata of 16linesCompresseddata of 16linesCompresseddata of 16linesCompresseddata of 16linesCompresseddata of 16linesCompresseddata of 16linescompress 6chindividuallyCCSDSPacketFixed LengthFrameFixed LengthFrameFixed LengthFrameFixed LengthFrameFixed LengthFrameFixed LengthFrameAPID: 1581 VCID:35VCID:34 VCID:33VCID:44 VCID:43 VCID:42NadirNadirFrame Frame FrameVCID:41 VCID:40 VCID:39BackwardFigure 3.4-2 PRISM Data Interface (Nadir 70km Observation Mode)FlightDirection1 39424・・・・・backward1 29952・・・・・nadir1 39424・・・・・forwardFigure 3.4-3 PRISM Pixel FootprintIn nominal observation of PRISM, 14,592 pixels are extracted from the range of extraction shown in the Tables3.4-1 and 3.4-2, and divided by three systems with 4,864 pixels, and compressed at each system, and thendownlinked after adding a VCID for each system. Therefore it is necessary for the ground processing to connectdata of three virtual channels of each radiometer. Nadir view radiometer and forward/backward view radiometerconsist of six CCDs and eight CCDs respectively, and have overlapped pixels in both ends. The overlapped pixelareas are shown in the Tables 3.4-1 and 3.4-2.3-30
ALOS Data Users HandbookTable 3.4-1 Extraction Area of Nadir Telescope [*3], [*4]CCDExtraction AreaOverlapped Pixel Area (nominal) [*2]No. Pixel no. [*1] Absolute pixel no. [*1](Absolute pixel no.)1 1 to 4,992 1 to 4,992 4,961 to 4,992 -2 1 to 4,992 4,993 to 9,984 4,993 to 5,024 9,953 to 9,9843 1 to 4,992 9,985 to 14,976 14,945 to 14,976 9,985 to 10,0164 1 to 4,992 14,977 to 19,968 14,977 to 15,008 19,937 to 19,9685 1 to 4,992 19,969 to 24,960 24,929 to 24,960 19,969 to 20,0006 1 to 4,992 24,961 to 29,952 24,961 to 24,992 -[*1]: Numbering only for the valid pixels of the CCDs[*2]: Number of electrical overlapped pixels is 32 (nominal) for each overlapped area of each CCD[*3]: Electrical extraction pixels (14,592) include the overlapped pixels within the extraction area.[*4]: Use the absolute pixel number for specifying a start pixel of extraction by the electrical pointingcommand.Table 3.4-2 Extraction Area for Forward and Backward Telescopes [*3], [*4]CCDExtraction AreaOverlapped Pixel Area (nominal) [*2]No. Pixel no. of each CCD [*1] Absolute pixel no. [*1](Absolute pixel no.)1 1 to 4,928 1 to 4,928 4,897 to 4,928 -2 1 to 4,928 4,929 to 9,856 4,929 to 4,960 9,825 to 9,8563 1 to 4,928 9,857 to 14,784 14,753 to 14,784 9,857 to 9,8884 1 to 4,928 14,785 to 19,712 14,785 to 14,816 19,681 to 19,7125 1 to 4,928 19,713 to 24,640 24,609 to 24,640 19,713 to 19,7446 1 to 4,928 24,641 to 29,568 24,641 to 24,672 29,537 to 295687 1 to 4,928 29,569 to 34,496 34,465 to 34,496 29,569 to 29,6008 1 to 4,928 34,497 to 39,424 34,497 to 34,528 -[*1]: Numbering only for the valid pixels of the CCDs[*2]: Number of electrical overlapped pixels is 32 (nominal) for each overlapped area of each CCD[*3]: Electrical extraction pixels (14,592) include the overlapped pixels within the extraction area.[*4]: Use the absolute pixel number for specifying a start pixel of extraction by the electrical pointingcommand. Nos. 1 to 1,270 of CCD1 and nos. 3,691 to 4,928 (absolute pixel nos. 38,187 to 39,424) of CCD8are out of the guaranteed range on its optical function, and therefore these pixels cannot be extracted.The PRISM data format is shown in Figure 3.4-4. The 4,864-pixel data consist of odd numbered pixels and evennumbered pixels. The odd numbered pixels and the even numbered pixels are arrayed on the same line whenthey are projected to ground. In addition, the AUX data shown in Table 3.4-3 are attached. The AUX data areseparated from the image data at the DC subsystem and only the image data of 4,864 pixels are compressed. TheAUX data are attached again to the compressed image data as Application Data Segment and then transmitted toground. The AUX data format is illustrated in Figure 3.4-5.3-31
Page 3: Meantime, global environmental prob
Page 6 and 7: Table Of Contents6.1.2 Scene Defini
Page 8 and 9: Table Of ContentsTable 5.2-1 ALOS O
Page 10 and 11: Table Of ContentsFigure 3.4-12 Layo
Page 13: ALOS Data Users HandbookSection 1 I
Page 16 and 17: Section 2 ALOS Missionphotovoltaic-
Page 18 and 19: Section 2 ALOS Missiontrial fabrica
Page 20 and 21: Section 3 Outline of ALOS Satellite
Page 70 and 71: Section 4 Overview of ALOS Mission
Page 72 and 73: Section 4 Overview of ALOS Mission
Page 75 and 76: ALOS Data Users HandbookSection 5 A
Page 77 and 78: ALOS Data Users Handbook5.3 Operati
Page 79 and 80: ALOS Data Users HandbookBecause CH1
Page 81 and 82: ALOS Data Users Handbook240Mbps rec
Page 83 and 84: ALOS Data Users HandbookDRTS.As a c
Page 85 and 86: ALOS Data Users HandbookIn this met
Page 87: ALOS Data Users HandbookTable 5.8-1
Page 90 and 91: Section 6 ALOS Data Productsnumber
Page 92 and 93: Section 6 ALOS Data Products6.1.3 P
Page 94 and 95: Section 6 ALOS Data ProductsFigure
Page 96 and 97: Section 6 ALOS Data ProductsTable 6
Page 98 and 99:
Section 6 ALOS Data Products6.2.4 P
Page 100 and 101:
Section 6 ALOS Data Products6.3.3 P
Page 102 and 103:
Section 6 ALOS Data ProductsTable 6
Page 104 and 105:
Section 7 Overview of Processing Al
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 137 and 138:
ALOS Data Users HandbookSection 8 D
Page 139 and 140:
ALOS Data Users Handbook8.5 Outline
Page 141 and 142:
ALOS Data Users HandbookALOS Centra
Page 143 and 144:
ALOS Data Users HandbookWith respec
Page 145 and 146:
ALOS Data Users Handbook8.7 AUIG8.7
Page 147 and 148:
ALOS Data Users HandbookFigure 8.7-
Page 149 and 150:
ALOS Data Users Handbook8.7.3 NOTES
Page 151:
APPENDIXALOS Data Users Handbook
Page 154 and 155:
Appendix 1 Acronyms and Abbreviatio
Page 157 and 158:
ALOS Data Users HandbookAppendix 2
show all

ALOS Data Users Handbook

Create successful ePaper yourself

Delete template?

Save as template?