McIDAS Programmer's Manual
Version 2003

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FRAMEn.p

Image frame files, where n is the frame number and p is the panel number.

The image frame file is a binary file that describes the contents of an image frame. For single panel (i.e. full screen) frames, y is zero. A single panel frame 1 uses file FRAME1.0; a 4-panel frame 2 uses files FRAME2.1 through FRAME2.4.

The file has three components:

The default size of the user extension is zero. The size can be modified by editing the the file m0panel.h and rebuilding McIDAS-X. No SSEC programs use the extension.

The navigation block contains the information for determining the location of the data points in physical space. The navigation block's format varies with each satellite. See the section titled Image-specific characteristics for image files (AREAnnnn).

For image frame Application Program Interfaces (APIs), refer to the API functions listing.

Frame directory

Word Description

0

sensor source number; -1 means no image is currently loaded on the frame and the remaining words can be ignored; see the SATANNOT file in this chapter for a description of the sensor source numbers

1

year and Julian day of the image, ccyyddd

2

time of the image, hhmmss

3

spectral band

4

upper-left image line in satellite coordinates

5

upper-left image element in satellite coordinates

6

reserved for system use

7

image frame line containing the upper-left image line

8

image frame element containing the upper-left image element

9

value specified for lmag in IMGDISP's MAG keyword, if it's positive;
1 if lmag is negative

10

displayed line resolution factor (where 1=base resolution of the instrument) if lmag in IMGDISP's MAG kewyord is negative;
line resolution factor of source image file if lmag is positive

11

displayed element resolution if emag in IMGDISP's MAG keyword is negative;
element resolution factor of source image file if emag is positive

12

year and Julian day the image was created, ccyyddd

13

time the image was created, hhmmss

14

year and Julian day the image frame was created, ccyyddd

15

time the image frame was created, hhmmss

16-18

reserved

19

value specified for lmag in IMGDISP's MAG keyword

20

value specified for emag in IMGDISP's MAG keyword

21-31

reserved

32

if positive, element blowup; if negative, same as word 11

33-35

reserved

36

original source type if changed by IMGCOPY, IMGREMAP, etc.; CHARACTER

37-38

file name used by the SU application; CHARACTER

39-52

reserved

53

displayed geographic line resolution x100 if GEORES=YES is specified in IMGDISP;
0 if GEORES=YES is not specified

54

displayed geographic element resolution x100 if GEORES=YES is specified in IMGDISP;
0 if GEORES=YES is not specified

55-60

ASCII ADDE dataset name from IMGDISP

61

position number within the ADDE dataset

62-63

NEXRAD station ID (NEXRAD image only)

API functions

Fortran Function Description

erafrm

flags a frame directory or navigation block as unused (erased)

frtonv

reads a navigation block

getfrm

reads a frame directory block

m0getusr

reads a user extension block

m0putusr

writes a user extension block

nvtofr

writes a navigation block

putfrm

writes a frame directory block


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