Changes between Version 4 and Version 5 of Sensors/ATM


Ignore:
Timestamp:
Feb 15, 2012 10:22:31 AM (7 years ago)
Author:
mark1
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Sensors/ATM

    v4 v5  
    11= ATM =
    22
    3 ATM comes as raw data on the flight disks and is moved into files by a program called azed.  Each data frame has a 16 bit header (holding the scan number?) then 11 unsigned ints of data.  Note that there are two types of ATM file - ones containing navigation (normally az*000 but not always) and ones containing imagery.
     3The NERC ARSF ATM is a multispectral scanner with 11 bands covering visible, near, short and thermal infra-red wavelengths. The instrument has been retired since the end of the 2008 flying season.
     4
     5Further technical information about the ATM is available from NEODC at http://www.neodc.rl.ac.uk/?option=displaypage&Itemid=52&op=page&SubMenu=-1 \\
     6and from ARSF operations at http://arsf.nerc.ac.uk/instruments/atm.asp
     7
     8== Band wavelengths ==
     9
     10||ATM Band no||Lower wavelength limit (nm)||Upper wavelength limit (nm)||
     11||1 || 424 || 448||
     12||2 || 469 || 518||
     13||3 || 522 || 601||
     14||4 || 594 || 635||
     15||5 || 627 || 694||
     16||6 || 691 || 761||
     17||7 || 754 || 924||
     18||8 || 897 || 1027||
     19||9 || 1600 || 1785||
     20||10 || 2097 || 2391||
     21||11 || 8400 || 11500||
     22
     23
     24== Raw data format ==
     25
     26ATM data comes as raw on the flight disks and is moved into files by a program called azed.  Each data frame has a 16 bit header (holding the scan number?) then 11 unsigned ints of data.  Note that there are two types of ATM file - ones containing navigation (normally az*000 but not always) and ones containing imagery.
    427
    528There's an apparent byte pattern of "AZSYS001" at the start of the files, at least for 2007 ATM.  I suspect if the data you're looking at is old (early 90s?) it will be different as there was a change to the ATM back then sometime.
     
    3053}}}
    3154
    32 Further technical information about the ATM is available from NEODC at http://www.neodc.rl.ac.uk/?option=displaypage&Itemid=52&op=page&SubMenu=-1
     55