7#,zv7v7v7v7v7vE xxxx x xxxxveHyK yk/z*z1v7zymzzz.zzzzzz MORE ABOUT SIR-C/X-SAR Follows on from previous NASA/JPL Imaging Radar missions: - SEASAT (1978) - SIR-A (1981) - SIR-B (1984) - Magellan (1991) Three frequency capability: - L-band (24cm wavelength) - C-band (6cm wavelength) - X-band (3cm wavelength) Four polarization capability: HH, HV, VH and VV measurements Space Shuttle Astronauts will photograph sites being imaged by SIR-C/X-SAR SIR-C Investigators (scientists) are divided up into teams, representing different disciplines: - Oceanography - Ecosystems - Hydrology - Geology - Rain and Clouds  SIR-C/X-SAR System Characteristics PARAMETER L-BAND C-BAND X-BAND Wavelength 0.235 m 0.058 m 0.031 m Swath Width 15 to 90 km 15 to 90 km 15 to 40 km Pulse Length 33.8, 16.9, 8.5 s 33.8, 16.9, 8.5 s 40 s Data Rate 90 Mbits/s 90 Mbits/s 45 Mbits/s Data Format 8,4 bits/word 8,4 bits/word 8,4 bits/word (8,4) BFPQ (8,4) BFPQ (8,4) BFPQ BFPQ = Block Floating Point Quantization, a form of data compression from 8 bits per sample to 4 bits per sample. SYSTEM PARAMETERS: Orbital Altitude 225 km Resolution 30 x 30 m on the surface Look Angle Range 17 to 63 degrees from nadir Bandwidth 10 and 20 MHz Pulse Repetition Rate 1395 to 1736 pulses per second Total Science Data 50 hours/channel/mission Total Instrument Mass 11,000 kg DC Power Consumption 3000 to 9000 W u5tD5fD5VC CddPro C Q*Y-t X QYt XP  "Af##### #######  C )e@)e,-.{/z{0yz1xy2wx3vw5uv6tu7st8rs:qr;pq<op=no>mn?jm@ej "@e## ###P "f##### #######  C eeggjjmmnnooppqqrrs st tu uv vw wxxyyzz{{~~e "e## ###P  "*###########(# C"*#####( Q, X 1i+ 0h," currentpoint /legm_top exch def /legm_left exch def " currentpoint '/legm_high exch legm_top sub 2 div def (/legm_wide exch legm_left sub 2 div def gsave newpath 0 setlinewidth &/save_matrix matrix currentmatrix def &/legm_wide legm_wide 2 mul 19 div def %/legm_high legm_high 2 mul 4 div def legm_left legm_top translate legm_wide legm_high scale 0 0 moveto 0 3 lineto 18 3 lineto save_matrix setmatrix clip gsave ddProd6dPro,"- grestore """-,-,-,"<;<;<;"KJKJKJ"ZYZYZY"ihihih"xwxwxw""""""""""ddPro grestore  CpddProP "#### C"#P "###########(# C"#####( A^-p H"W currentpoint /legm_top exch def /legm_left exch def "!_ currentpoint '/legm_high exch legm_top sub 2 div def (/legm_wide exch legm_left sub 2 div def gsave newpath 0 setlinewidth &/save_matrix matrix currentmatrix def %/legm_wide legm_wide 2 mul 8 div def %/legm_high legm_high 2 mul 8 div def legm_left legm_top translate legm_wide legm_high scale 0 0 moveto 4 1 lineto 7 2 lineto 7 5 lineto 4 7 lineto 0 7 lineto 0 0 lineto save_matrix setmatrix clip gsave ddProd6dPro4W ^WYY]]^]^ W]"1o grestore "WTTT"X"Y"ZUUUUUU"[***"\"]ddPro grestore  Cp*W ^W[^^ [ WWWddProP "W############ C######""W currentpoint /legm_top exch def /legm_left exch def "*_ currentpoint '/legm_high exch legm_top sub 2 div def (/legm_wide exch legm_left sub 2 div def gsave newpath 0 setlinewidth &/save_matrix matrix currentmatrix def %/legm_wide legm_wide 2 mul 8 div def %/legm_high legm_high 2 mul 8 div def legm_left legm_top translate legm_wide legm_high scale 0 0 moveto 4 1 lineto 7 2 lineto 7 5 lineto 4 6 lineto 0 7 lineto 0 0 lineto save_matrix setmatrix clip gsave ddProd6dPro4"W)^"W\#\]$]^(Z^)WZ":o grestore ""WTTT""X""Y""ZUUUUUU""[***""\""]ddPro grestore  Cp*"W)^"W"[$^'^([)W"W"WddProP ""W############ C######" \ currentpoint /legm_top exch def /legm_left exch def "#o currentpoint '/legm_high exch legm_top sub 2 div def (/legm_wide exch legm_left sub 2 div def ""^ currentpoint )/legm_radius exch legm_top sub 2 div def Llegm_left sub 2 div dup legm_radius gt {/legm_radius exch def} {pop} ifelse gsave newpath 0 setlinewidth &/save_matrix matrix currentmatrix def 9legm_wide legm_left add legm_high legm_top add translate Alegm_wide legm_left add neg legm_high legm_top add neg translate ,/legm_high legm_high 2 mul legm_top add def -/legm_wide legm_wide 2 mul legm_left add def *legm_left legm_radius add legm_top moveto Hlegm_wide legm_top legm_wide legm_top legm_radius add legm_radius arcto 4 {pop} repeat Jlegm_wide legm_high legm_wide legm_radius sub legm_high legm_radius arcto 4 {pop} repeat Jlegm_left legm_high legm_left legm_high legm_radius sub legm_radius arcto 4 {pop} repeat Hlegm_left legm_top legm_left legm_radius add legm_top legm_radius arcto 4 {pop} repeat save_matrix setmatrix clip gsave ddProd6dPro- \#o"8t grestore " U "U"V&f&f&f"V323232"W???"XLLL"XYYY"Yfefefe"Zs2s2s2"Z"[ˌˌ"\"\eee"]111"^"^"_ٗٗٗ"`ddd"`111"a"bddPro grestore  C @ \#o H"* currentpoint /legm_top exch def /legm_left exch def ". currentpoint '/legm_high exch legm_top sub 2 div def (/legm_wide exch legm_left sub 2 div def gsave newpath 0 setlinewidth &/save_matrix matrix currentmatrix def &/legm_wide legm_wide 2 mul 19 div def %/legm_high legm_high 2 mul 4 div def legm_left legm_top translate legm_wide legm_high scale 0 3 moveto 0 0 lineto 18 0 lineto save_matrix setmatrix clip gsave ddProd6dPro4*.*+,-."B grestore "*"*"*-,-,-,"*<;<;<;"*KJKJKJ"*ZYZYZY"*ihihih"*xwxwxw"*"*"*"*"*"*"*"*"*"*ddPro grestore  Cp*..**.ddProP ".#### C".#"f"-f1!81"$8P "!########  C !####P "########  C$####P "########  C$####P ""########  C$"$"#$####P "$######  C %&####P "'########  C %'####P # 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