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CHAPTER 5:
Tutorial:
Sample Archive Session





In this chapter we will work through a quick sample STARCAT
session, from initial login through file retrieval. This example shows how
to search for and retrieve public HRS observations of 3C273. In this
example, we will actually retrieve data. You can not retrieve data unless
you are a registered archive user.

1. Access the STDATU computer:

telnet stdatu.stsci.edu
Connected to stdatu.stsci.edu.
Escape character is `^]`.
Username: Type your username
Password: Type your password


2. Read the archive news by typing:

$ readnews

3. Start STARCAT by typing:

$ starcat

4. The banner screen (Figure 5.1) will appear. Press to enter menu
mode. Press to bring up the HST Catalog. The top-level menu
(Figure 5.2) will appear.

If your screen is garbled when you start STARCAT, exit STARCAT and
type vt100 before restarting .



Figure 5.1: Banner Screen

Figure 5.2: Top-Level Menu

5. Press to select a screen and then use the cursor keys to move to
GENERAL, and press , this brings up the GENERAL
screen (Figure 5.3).

Figure 5.3: The GENERAL Screen

6. Now let's define our search criteria. For this example, we will search
for publicly-accessible HRS observations of 3C273. Press to
begin qualifying:



Figure 5.4: Specifying Search Criteria

7. Move to the first field (Target Name) using either the cursor keys or
the key.

8. Type the name of the target you want to look for. In this case,
"*3c273*." Note the use of wild cards (*) so that the target will be
found regardless of any preceding or trailing characters or spaces that
might appear in the field.

9. Move to the next field of interest, in this case Instrmnt. Notice that
when you move out of a field, the case gets converted to upper case
and the equal sign gets added. (You can do this yourself if you wish.)

10. Type the instrument name. In this case "HRS."

11. Move to the next field of interest, in this case release date, since
we want to find only public data.

12. Specify that you want to look for data older than today's date. For
example, type "<01-Jan-93".

13. Press when you are done specifying criteria.

14. Press to find the first record that matches this set of criteria. In
this case, you would see something like Figure 5.5.

Figure 5.5: Sample Record Satisfying All Sample Criteria

15. Press to mark the record for retrieval. You can also press to
scan for all records matching your search criteria, and then press
to mark all of those records.

16. Press to exit and bring up the menu screen.

17. Press to begin retrieving files for the marked record. This will
bring up the retrieval screen (Figure 5.6).

Figure 5.6: Retrieval Screen

18. These are HRS data sets, so the defaults are acceptable. Press to
continue with the retrieval process. This brings up the Dearchiving
Screen (Figure 5.7).

Figure 5.7: DeArchiving Screen

19. Press to edit the screen. Type your STARCAT Username and
Password (the guest account does not allow you to retrieve files).

20. We want to retrieve the files via FTP, so the defaults of Media set to
LAN and Format to GEIS are acceptable. This will store the files on
disk in a subdirectory of the data directory on STDATU.

21. Press to bring back the menu.

22. Press to continue the retrieval process. This brings up the Request
Submission screen (Figure 5.8) from which you can edit the list of files
that will be retrieved.

Figure 5.8: Request Submission Screen

23. Press to submit the retrieve request.

24. A message will appear on your screen when you get back to the menu
telling you that the retrieval was successful; this message gives you a
request number. Write down the retrieve request identification string.
The list of files in your retrieve request is written to a file in your work-
ing directory with the request identification string for a file name and
an extension of .req, for example, oort0129.req.

You can now either continuing working in STARCAT, or you can
exit-you could also exit from the STDATU system altogether and wait for
the mail message telling you that the files have been retrieved and are ready
for you (the message will go to your home system).

25. Exit STARCAT by pressing several times.

26. Go the directory where your data have been stored, for example:

$ data
$ cd oort0129

27. Type DIR from the system prompt to see what files are in your direc-
tory. For example:

$ dir

Z0GU0101T.C0H;1
Z0GU0101T.C0D;1
Z0GU0101T.C1H;1
Z0GU0101T.C1D;1
Z0GU0101T.D0H;1
Z0GU0101T.D0D;1
Z0GU0101T.SHH;1
Z0GU0101T.SHD;1

28. Convert the VMS format GEIS files to Unix format GEIS files (this
step will not be needed if you are planning to transfer your files to a
VMS machine for further analysis). First, make a list of all header
files, then create a directory where the converted files will be written,
and finally, run the task to convert the files. For example,

$ files
template: *.*h
outfile: myfile.lst
$ mkdir converted
$ vax2sun
input: @myfile.lst
output: converted

29. Logout from the STDATU computer. (Type logout).

30. Use FTP to access the STDATU computer:

% ftp stdatu.stsci.edu
Connected to stdatu.stsci.edu
220 stdatu.stsci.edu FTP server (Version 5.83) ready.
Name (stdatu.stsci.edu):
Password:
.
.
ftp> cd /stdatu/dmf_stage/oort0129/converted
250 CWD command successful
ftp> binary
200 Type set to I.
ftp> mget Z0GU0101T*
get Z0GU0101T.C0H? y
150 Opening binary mode data connection for Z0GU0101T.C0H
226 Transfer complete
.
.
ftp> bye
221 Goodbye



31. Use STSDAS or other software to analyze the data set.

Good luck!
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