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Jun

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About Jun

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  1. Hi Tom, thank you for your reply. I just read it because I did not get a email saying someone had replied. I can not think out other constrains except for the anaglyph mosaics right now. Thanks again. Jun
  2. Hi, Thanks for the great product of Analyst's Notebook! I tried to sign up a new account, but it always tells me the password was too simple. I tried some complicated combinations including letters and numbers, and it still says "it is too weak" A second question is: how can I search only the red-blue mosaics of the NC? I tried to read the help file and go through all the options, but no good luck. Thanks, Jun
  3. Thank you for your reply, Frank! Thank you for the help, Jennifer! Jun
  4. Hi there, I have installed CAT7.2 on both centos 6 (ENVI 4.7) and win XP (ENVI 4.8), when I try "clean spectral cube" for the atmospheric corrected data (HRL0000D2E5_07_IF180L_TRR3_CAT_corr.img), it shows "Destripe Error" ( No good data in HRL0000D2E5_07_IF180L_TRR3_CAT_corr.img Aborting Destripe.) I tried the one in 09 workshop (FRT000064D9_07_IF166L_TRR3_CAT_corr.img), and it shows the same error. I chose "Empirically optimized for this observation" for atmospheric correction. BTW, which vocanic scan method is recommended? Thanks! Jun
  5. SHARAD ground intercept points

    Thank you very much! Jun
  6. have a question regarding the SHARAD RDR products. I noticed that the rdr.fmt file describes several geographic parameters in each data record. http://pds-geoscienc...1/label/rdr.fmt Specifically, I see the SUB_SC_PLANETOCENTRIC_LATITUDE and SUB_SC_EAST_LONGITUDE. I realize that this point may not coincide completely with the actual footprint of SHARAD on the surface. That depends on how far off nadir the instrument aims. Does SHARAD acquire data sufficiently off nadir such that I need to apply SC_YAW_ANGLE, SC_PITCH_ANGLE and SC_ROLL_ANGLE to determine the Mars surface intercept points? Are the ground intercept points perhaps described elsewhere in the rdr.fmt? Thank you, Jun
  7. I have a question regarding the SHARAD RDR products. I noticed that the rdr.fmt file describes several geographic parameters in each data record. http://pds-geosciences.wustl.edu/mro/mro-m-sharad-4-rdr-v1/mrosh_1001/label/rdr.fmt Specifically, I see the SUB_SC_PLANETOCENTRIC_LATITUDE and SUB_SC_EAST_LONGITUDE. I realize that this point may not coincide completely with the actual footprint of SHARAD on the surface. That depends on how far off nadir the instrument aims. Does SHARAD acquire data sufficiently off nadir such that I need to apply SC_YAW_ANGLE, SC_PITCH_ANGLE and SC_ROLL_ANGLE to determine the Mars surface intercept points? Are the ground intercept points perhaps described elsewhere in the rdr.fmt? Thank you, Jun
  8. Hi Susan, Thanks for the quick reply! I really appreciate that! I think it will work best regards, Jun
  9. Hi all, Greetings! In the PDS node (http://geo.pds.nasa.gov/missions/mro/sharad.htm), for the Derived Data Products (DDR), the lbl files hold the information for the data file). In the lbl files, there are for values for the latitude and longitude: MRO:START_SUB_SPACECRAFT_LONGITUDE = 97.749998 <DEG> MRO:START_SUB_SPACECRAFT_LATITUDE = -24.689301 <DEG> MRO:STOP_SUB_SPACECRAFT_LONGITUDE = 95.934470 <DEG> MRO:STOP_SUB_SPACECRAFT_LATITUDE = -37.625862 <DEG> However, if one observation has a very large latitude range (say 30 - 50 degrees), using only two points (start and end) can not show the accurate ground track (since Mars is rotating). If I only have two points and the straight line between them, it is not correct (I guess the real ground track should looks curve ?) So how can I get accurate ground track for each orbit? Thanks in advance, Jun
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