IMGCHA

Changes an image directory.

Format

IMGCHA dataset [keywords]

Parameter

dataset

ADDE dataset name and position; specify one of the following formats:

group/descriptor.position

alias.position

only positive integers are valid for position

Keywords

BANd=	changes the image band number; the range is 1 to 64
	NA	changes the band sequence to unavailable; reserved for GOES visible images prior to GOES-8
CTYpe=	changes the calibration type
DAY=	changes the Julian day (YYDDD) of the image
ELE=	changes the beginning image element number
ID=	changes the NEXRAD station ID to the specified value, e.g., MKX
LINe=	changes the beginning image line number
MEMo=	'text'	changes the text in the memo field; 32 characters maximum
OTYpe=	changes the original source type
RES=	line ele	changes the line and element resolution
SS=	changes the sensor source number
STYpe=	changes the source type
TIMe=	changes the time (HH:MM:SS) of the image
VALcode=	changes the validity code

Remarks

CAUTION: Do NOT change any directory values unless you are familiar with the structure of the image data and its source.

Use command IMGLIST with FORM=ALL to list the image directory values that can be changed with the IMGCHA command. An example is shown below.

Pos  Satellite/    Date        Time      Center       Res (km)    Image_Size
      Sensor                            Lat   Lon    Lat   Lon
---  --------   ------------  -------   ---   ---    ---   ---    ----------
11   G-10 IMG   16 APR 02106  19:00:00   34    118   
Band: 4  10.7um Surface temp; longwave window        5.54  2.55   480 X 640
proj:   0  created 2002106  194538  memo:  RT GVAR
type:GVAR    cal type:RAW
offsets:  data=3328 navigation=  256 calibration= 2816 auxiliary=  0
doc length:   0  cal length:   0  lev length:   0 PREFIX=   0
valcod:         0 zcor:   0 avg-smp: N
start yyddd: 2002106 start time:190013  start scan:  316
lcor: 3601  ecor: 16617  bytes per pixel: 2  ss: 74
Resolution Factors (base=1):    Line=   4.0    Element=   4.0

The table below shows which IMGCHA keywords correspond to the output fields.

IMGCHA keyword	IMGLIST output field
BAND	Band
CTYPE	cal type
DAY	Date
ELE	ecor
LINE	lcor
MEMO	memo
RES	Resolution Factors
SS	ss
STYPE	type
TIME	Time
VALCODE	valcod

Examples

IMGCHA RT/GOES-IR.1 TIME=16:14:59

This entry changes the directory of the image in position 1 of datasetRT/GOES-IR.1. The image time is changed to 16:14:59.

IMGCHA N14.99 LINE=2075 MEMO='Band 2 NOAA-14 HRPT over Florida'

This entry changes the directory of the image in position 99 of the dataset with the alias name N14. The beginning image line number is changed to 2075 and the memo field is changed to "Band 2 NOAA-14 HRPT over Florida."