From: Richard B. Langley <lang@unb.ca>
Subject: Re:  GPS Systems
Organization: University of New Brunswick
Distribution: global
Date: Tue, 21 Jul 1992 13:40:44 GMT

For those that might be interested in GPS, here is a way to get more info:

                                                                               

                        CANADIAN SPACE GEODESY FORUM                           

                                                                               

As an aid to improving communication among scientists and engineers working
with
the techniques of space geodesy, an information dissemination and discussion   

group, called the Canadian Space Geodesy Forum, has been set up on the         

Internet/BITnet/NetNorth/EARN computer communications network.  Messages       

consisting of news, comments, questions, and answers are exchanged among forum 

participants by means of a LISTSERV list.  LISTSERV is an electronic mail      

utility that allows a message to be sent "simultaneously" to a list of         

individuals simply by sending the message to the list address.  The address of 

the Canadian Space Geodesy Forum is CANSPACE@UNB.CA.  Files can also be        

distributed or retrieved from CANSPACE including the monthly message archives. 

                                                                               

Any topic related to the space geodetic techniques of GPS, Transit, VLBI, SLR, 

satellite altimetry, etc., may be discussed.  Information concerning satellite 

launches and orbital elements may be posted.  Questions are particularly       

encouraged.  GPS Constellation daily status reports and ionospheric disturbance

warnings are posted.                                                           

                                                                               

CANSPACE is directly accessible through computers on the Internet/BITnet/      

NetNorth/EARN networks.  CANSPACE is also accessible from other networks such
as
CSnet, UUCP, Telemail, etc. through various gateways.  Individuals may also    

communicate through CompuServe and the various bulletin board systems on the   

FidoNet network.  Although initially intended to link Canadian geodesists and  

geophysicists together, CANSPACE now has a wide international subscriber list  

and is open to all.                                                            

                                                                               

To subscribe to CANSPACE it is necessary for you to send a message to          

LISTSERV@UNB.CA (***not*** to CANSPACE) with the following text:               

                                                                               

SUB CANSPACE yourname                                                          

                                                                               

To find out who else is participating in the forum, send the following message 

to LISTSERV@UNB.CA:                                                            

                                                                               

REV CANSPACE                                                                   

                                                                               

To have a message distributed to CANSPACE subscribers, send the message to     

CANSPACE@UNB.CA.  The message will be automatically distributed.               

                                                                               

Additional CANSPACE archive material can be obtained via the File Transfer     

Protocol (FTP).  Send a message to LANG@UNB.CA to request further information. 

                                                                               

CANSPACE is maintained at the University of New Brunswick by Terry Arsenault
and
moderated by Richard Langley.  They can be reached directly via SE@UNB.CA or by

phone at (506) 453-4698 or by fax at (506) 453-4943.                           

                                                                               

If you have any difficulties in accessing CANSPACE or want more information on 

the use of a LISTSERV message/file server, consult your local LISTSERV resource

person or contact the Dept. of Surveying Engineering at UNB.                   

                                                                               

Richard B. Langley (LANG@UNB.CA)                                               

Geodetic Research Laboratory                                                   

Dept. of Surveying Engineering                                                 

University of New Brunswick                                                    

Fredericton, N.B.                                                              

Canada  E3B 5A3                                                                

                                                                               

Message Archives                                                               

----------------                                                               

All messages posted to the LISTSERV-based CANSPACE mailing list are archived in

monthly notebooks.                                                             

                                                                               

Archived postings can be recovered using the LISTSERV DATABASE function.       

Here is an example of how to use this function.  To list the sequenced index   

(item) numbers of the postings in the archives which contain, for example, the 

word "launch" and to list the contents of these particular postings, the body
of
a message sent to LISTSERV@UNB.CA should look like this:                       

                                                                               

   //  JOB  ECHO=NO                                                            

   DATABASE SEARCH DD=RULES                                                    

   //RULES DD  *                                                               

   SELECT LAUNCH in CANSPACE                                                   

   INDEX                                                                       

   PRINT                                                                       

   /*                                                                          

                                                                               

The result of the archive search will be sent back to you as an e-mail         

message.  You can substitute any other word or phrase for the word "launch".   

If you just want the item numbers, dates, and subject headers of the postings  

containing the particular word or phrase, leave out the PRINT command.  You    

can print selected items by specifying the item number(s) with the PRINT       

command; e.g.,                                                                 

                                                                               

   PRINT 62, 74                                                                

                                                                               

To find out more about the LISTSERV DATABASE function, send the one-line       

message                                                                        

                                                                               

   INFO DATABASE                                                               

                                                                               

to LISTSERV@UNB.CA or any machine on BITnet/EARN/NetNorth which supports       

LISTSERV.  You'll get the DATABASE manual back as an e-mail message.           

                                                                               

                                                                               

File Archives                                                                  

-------------                                                                  

CANSPACE also supports an archive of information files related to space
geodesy.
Such files include basic descriptions of GPS, lists of GPS information sources,

GPS satellite Keplerian elements, etc.  These files may be retrieved using     

anonymous ftp -- either directly or via an e-mail <-> ftp server.              

                                                                               

CANSPACE-related files are on UNBMVS1.CSD.UNB.CA (131.202.1.2) in the          

"sub-directory" PUB.CANSPACE.  Note that after you connect to UNBMVS1 you must 

give a CHANGE DIRECTORY command before you can list file names -- there is no  

initial default directory.  To learn more about the vagaries of the MVS FTP    

facility at UNB, read the file PUB.$README.                                    

                                                                               

Additional files for inclusion in the CANSPACE FTP file archives are welcome.  

                                                                               

                                                                               

25 May 1991; Revised 26 September 1991; Revised 16 December 1991;              

Revised 6 March 1992; Revised 4 July 1992                                      

                                                                               

INDEX OF FILES UNDER PUB.CANSPACE                                              

---------------------------------                                              

                                                                               

$README                     Introduction to CANSPACE, the Canadian Space       

                            Geodesy Forum, a LISTSERV-based news and           

                            discussion mailing list.                           

                                                                               

ARCHIVES                    Information on accessing the CANSPACE archives.    

                                                                               

CDNGEOPH.BULTIN88           Text of the geodesy chapter of the 1988 edition of 

                            the Canadian Geophysical Bulletin.                 

                                                                               

CDNGEOPH.BULTIN89           Text of the geodesy chapter of the 1989 edition of 

                            the Canadian Geophysical Bulletin.                 

                                                                               

DAILY.SOLARGEO.DATABCST.FORMAT                                                 

                            Description of the format used for the daily solar 

                            geophysical data broadcasts from Cary Oler's Solar 

                            Terrestrial Dispatch data service.                 

                                                                               

FTP.BITNET.EMAIL.ACCESS     This document describes how to retrieve files from 

                            anonymous ftp sites (such as unbmvs1.csd.unb.ca)
via
                            the Princeton BITNET ftp server.  You must be on a 

                            BITNET node to use this service.  If you are not on

                            a BITNET node, see FTP.GENERAL.EMAIL.ACCESS.       

                                                                               

FTP.GENERAL.EMAIL.ACCESS    This document describes how to retrieve files from 

                            anonymous ftp sites via e-mail using the ftpmail   

                            facility at decwrl.dec.com.  To retrieve files
using
                            this facility, compose an e-mail message using the 

                            commands listed in this document and send the      

                            message to ftpmail@decwrl.dec.com.                 

                                                                               

GEODESY.IN.CANADA           Text of the quadrennial Canadian National Report on

                            Geodesy for the International Union of Geodesy and 

                            Geophysics as presented at the XX General Assembly 

                            of the IUGG, Vienna, 11 - 24 August 1991.          

                                                                               

GPS.CONSTEL.STATUS.Dyymmdd  The latest Navstar GPS Constellation Status
summary.
                                                                               

GPS.ELEMENTS.NASA.#nnn      Current GPS constellation orbit element sets in    

                            NASA Prediction Bulletin 2-line format.            

                                                                               

GPS.ELEMENTS.NASA.#nnn.MACSAT                                                  

                            Current GPS constellation orbit element sets con-  

                            verted from NASA Prediction Bulletin 2-line format 

                            to MacSat tracking program format.                 

                                                                               

GPS.GUIDE.INFO              Information on Canadian GPS Associates' Guide to   

                            GPS Positioning.                                   

                                                                               

GPS.INFO.SOURCES            A brief directory of sources of information on the 

                            Global Positioning System.                         

                                                                               

GPS.MANUFACT                A list of GPS equipment manufacturers.             

                                                                               

GPS.SYSTEM.DESCRIPT.USNO    A description of GPS with emphasis on its use for  

                            accurate time transfer.  This file was obtained
from
                            the USNO ADS where it exists as file GPSSY.        

                                                                               

GPS.WORLD.INDEX.PS.Z        A detailed index to GPS World magazine in
PostScript
                            print file format.  The file has been compressed   

                            using the standard Unix format.                    

                                                                               

GPS.WORLD.INDEX.TEXT.Z      Plain text version of the above file.              

                                                                               

GPS.WORLD.INFO              Information on GPS World magazine.                 

                                                                               

GPSIC                       Description of the services provided by the U.S.   

                            Coast Guard's Information Center.  This file was   

                            prepared by the U.S. Naval Observatory.            

                                                                               

LOG9011                     CANSPACE archive for November 1990 (missing from   

                            LISTSERV archives).                                

                                                                               

LOG9012                     CANSPACE archive for December 1990 (missing from   

                            LISTSERV archives).                                

                                                                               

MACSAT.USERS.GUIDE.HQX      BinHexed file containing the user's guide for the  

                            Macintosh-based MacSat satellite tracking program. 

                                                                               

TEC.M9108.Z                 A summary of hourly total electron content data as 

                            reported by seven western hemisphere and four      

                            eastern hemisphere stations for part of the month  

                            of August 1991. Report prepared by Cary Oler of    

                            the Solar Terrestrial Dispatch from data supplied  

                            by the Space Environment Laboratories, NOAA. This  

                            is a binary file in compressed Unix format.        

                                                                               

TEC.Myymm.ZIP               As above for month mm, 19yy. Compressed ZIP format.

                                                                               

UNB.GPS.BIBLIO              A bibliography of UNB's publications relating to   

                            the Global Positioning System.                     

                                                                               

WHEN.HQX                    A BinHexed Macintosh HyperCard stack for converting

                            a UTC or GPS time epoch to the GPS Week, seconds of

                            week, and day of the year. It also computes the    

                            Julian Date and Modified Julian Date of the        

                            corresponding UTC epoch. Requires HyperCard 2.0    

                            or later. 
                                          
==============================================================================
 Richard B. Langley                        Internet: LANG@UNB.CA or SE@UNB.CA
 Geodetic Research Laboratory              BITnet:   LANG@UNB or SE@UNB
 Dept. of Surveying Engineering            Phone:    (506) 453-5142
 University of New Brunswick               FAX:      (506) 453-4943
 Fredericton, N.B., Canada  E3B 5A3        Telex:    014-46202
==============================================================================