SUMMARY

Opens a alphanumeric pick file.

SYNTAX

OAPF {STANDARD|NAME},{file}

INPUT

STANDARD: Use the standard file id when writing picks. The standard id consists of the event name, the station name, and the component azimuth and incident angles from the SAC header.

NAME: Use the name of the SAC data file instead of the standard id.

file: The name of the alphanumeric pick file to open. If a file by that name already exists, it is opened and new picks are added at the bottom.

STANDARD:	Use the standard file id when writing picks. The standard id consists of the event name, the station name, and the component azimuth and incident angles from the SAC header.
NAME:	Use the name of the SAC data file instead of the standard id.
file:	The name of the alphanumeric pick file to open. If a file by that name already exists, it is opened and new picks are added at the bottom.

DEFAULT VALUES

OAPF STANDARD APF

DESCRIPTION

The alphanumeric pick file can be used like a simple data base for picks produced by the automatic picker (APK) and manual pick plot (PLOTPK) command. One line is written for each pick. Each normal line in one of these files consists of the file id, the pick id, the time of the pick, the amplitude of the pick, and some formatting information. These lines are 80 characters long. The file id is the standard one consisting of selected fields from the header as mentioned above or the name of file. The time of the pick is either the GMT time or the offset time. This depends upon the options specified in the commands generating the pick, such as APK or PLOTPK. This leads to four distinct formats, designated by a different character in column 79. Some lines, such as those from waveform and peak-to-peak picks, contain additional fields after column 80. The maximum length of a line is 200 characters. The specific formats of these various lines are shown in the tables on the following pages.

ERROR MESSAGES

1903: Can't close previous card image pick file.
1902: Can't open card image pick file
- Probably an illegal character in filename.

SEE COMMANDS

PLOTPK, APK, CAPF

LATEST REVISION

January 8, 1983 (Version 8.0)

FILE FORMAT

Standard file id and GMT time options

column	format	contents
01	a16	event name
17	a8	station name
25	f7.2	component azimuth
32	f7.2	component incident angle
39	a4	pick id
43	i5	year of pick
48	i3	julian day
51	i3	hours
54	i3	minutes
57	f6.2	seconds
63	g10.4	amplitude of pick
74	a1	source of pick
		"A" if an automatic pick (APK)
		"M" if a manual pick (PLOTPK)
79	a1	"B"

File name and GMT time options

column	format	contents
01	a32	file name
39	a4	pick id
43	i5	year of pick
48	i3	julian day
51	i3	hours
54	i3	minutes
57	f6.2	seconds
63	g10.4	amplitude of pick
74	a1	source of pick
79	a1	"C"

Standard file id and offset time options

column	format	contents
01	a16	event name
17	a8	station name
25	f7.2	component azimuth
32	f7.2	component incident angle
39	a4	pick id
53	g10.4	offset time of pick
63	g10.4	amplitude of pick
74	a1	source of pick
79	a1	"D"

File name and offset time options

column	format	contents
01	a32	file name
39	a4	pick id
53	g10.4	offset time of pick
63	g10.4	amplitude of pick
74	a1	source of pick
79	a1	"E"

For waveform picks, the pick time and amplitude is that of the first zero crossing. Additional waveform pick fields are

column	format	contents
080	f6.3	incremental time of first peak
086	f6.3	incremental time of second crossing
092	f6.3	incremental time of second peak
098	f6.3	incremental time of third crossing
105	g10.4	amplitude of first peak
116	g10.4	amplitude of second peak

For peak-to-peak picks, the pick time and amplitude is that of the first peak. Additional peak-to-peak pick fields are

column	format	contents
80	f6.3	incremental time of second peak
87	g10.5	amplitude of second peak