McIDAS User's Guide
Version 2019.1
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AXFORM
Converts a McIDAS Area file to ASCII or binary flat files.
Format
AXFORM area
file [keywords]
Parameters
area |
area
number |
file |
output
file; maximum of 100 characters; specify as a file name or a fully qualified
path (directory and file name); do not include an extension with the
file name; see the Remarks |
Keywords
BANd= |
band
numbers for a multibanded area (default=first band) |
|
ALL |
all
bands of area |
FLIp= |
YES |
flip
bytes; specify this keyword when the byte order on the destination system
is the reverse of the source system, e.g., from a PC to a Unix workstation |
|
NO |
do
not flip bytes (default) |
FORmat= |
I1 |
output
elements are 1-byte integers |
|
I2 |
output
elements are 2-byte integers |
|
I4 |
output
elements are 4-byte integers |
|
(default=see
the Remarks) |
FTYpe= |
ASC |
ASCII
text files with 25I10 format |
|
BIN |
binary
files, as specified in keyword FORMAT (default) |
|
BOTH |
both
ASCII and binary file types |
MISs= |
missing
data value for .LAT/.LON extension files (default=65535 Hex FFFF) |
NAV= |
YES inc |
produces
.LAT/.LON data files with an element increment; these files contain LAT/LON
stored as degrees*100 (2 bytes per element; the increment is the number
of data elements associated with each LAT/LON element (default=NO 1) |
UNIt= |
physical
quantity of the output files; see the Remarks (default=calibration units
of area) |
|
ALL |
all
calibration units defined by area |
Remarks
AXFORM creates
a set of files containing data from area. These files can be ported
to other non-McIDAS systems. Data is represented as 2-dimensional arrays of
binary or ASCII fields with the same dimensions as the original area lines/elements.
An ASCII
output text file documents the format of the output data files, and contains
a listing for each data file generated. Output files are assigned the extensions
below. The definitions for .LAT, .LON, .ALT, and .ALN assume keyword NAV=YES.
| Extension |
Meaning |
| .HDR |
header
file containing ASCII text describing area and the contents of the output
data files |
| .nnn |
data
file containing binary data for a single calibration of a specific band;
the range for nnn is 001 to 999 |
| .Ann |
data
file containing ASCII data for a single calibration of a specific band;
the range for nn is 01 to 99 |
| .LAT |
binary
file containing a 2-dimensional array of latitudes corresponding to the
elements in the output data files |
| .LON |
binary
file containing a 2-dimensional array of longitudes corresponding to
the elements in the output data files |
| .ALT |
ASCII
file containing a 2-dimensional array of latitudes corresponding to the
elements in the output data files |
| .ALN |
ASCII
file containing a 2-dimensional array of longitudes corresponding to
the elements in the output data files |
The defaults
for keyword FORMAT are shown below. They assume FTYPE=BIN or BOTH.
| If UNIT= |
Then FORMAT= |
| BRIT |
I1
(1-byte integer) |
| TEMP |
I2
(2-byte integer) |
| RAD |
I4
(4-byte integer) |
| ALB |
I2
(2-byte integer) |
| RAW |
number
of bytes/element from area directory |
| other |
I1
(1-byte integer) |
Examples
AXFORM 12 GOES_VIS
This entry
creates a binary file of brightness values from area 12 and places the information
in GOES_VIS.001.
AXFORM 12 GOES_VIS FTYPE=BOTH
This entry
creates binary and ASCII files of the brightness values from area 12. The data
is placed in GOES_VIS.001 and GOES_VIS.A01.
AXFORM 43 MULTBAND BAND=2 3 5 UNIT=TEMP NAV=YES 45
This entry
creates binary files for the TEMP values from bands 2, 3 and 5 of area 43.
The information is placed in MULTBAND.001, MULTBAND.002 and MULTBAND.003,
respectively. Latitude and longitude grid files are also created and placed
in MULTBAND.LAT and MULTBAND.LON.
The lat/lon resolution is 1 lat/lon point for every 45 image elements.
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