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CDDIS Bulletin - June 1991
Volume 6 No. 5
In this issue:
On the cover: GPS Site Locations for GIG'91 April
1 Data Set
In 1990 an erasable optical disk system was procured and
installed on the CDDIS MicroVAX. This unit, manufactured by
Alphatronix, contains two 5.25Ò Sony optical disk drives
with a capacity of 325 mbytes per platter. An additional 650
mbytes (325 mbytes on each of two disks) is near-line by simply
dismounting a disk and flipping it over to access the other
side. To a user of the system these drives appear like any
other magnetic disk drives. The device supports a typical VMS
directory file structure and allows files created there to
be deleted with full recovery of space allocation after deletion.
Thus far, these disks have been utilized to archive the raw
and RINEX data from various GPS experiments submitted to the
CDDIS. To date over 1.3 gbytes of GPS data have been stored
in this manner. Interested users can then electronically transfer
selected data sets directly to their home institutions via
DECnet or TCP/IP. GPS data has also been sent to users having
similar disk devices operational on their computer facilities.
The current configuration of the CDDIS computing facility
is shown in the figure on the following page.
There have been several important changes to the most recent
issue (April 1991) of the CDP Personnel and Networking
Directory. Since a new directory will not be generated
for several months, important changes are discussed in this
article.
We regret that the published FAX number of Dr. Bernard Minster
is incorrect; it should read 619-534-5332.
Interested parties should make this correction in their directory.
In addition, many of the OMnet accounts listed in the directory
have been discontinued as of May 1, 1991. Below is a list of
the cancelled accounts.
A.LAMBERT M.PEARLMAN
B.SCHUPLER MASER.VLBI
BENDIX.VLBI MOJAVE.VLBI
BERKLEY.VLBI MPI.VLBI
C.MA MV1.VLBI
FBKS.VLBI MV2.VLBI
FTDAVIS.VLBI MV3.VLBI
GSFC.CDP N.VANDENBERG
H.FREY.GSFC NGS.VLBI
HARTRAO.VLBI NRL.VLBI
HATCREEK.VLBI ONSALA.VLBI
HAWAII.VLBI P.SHELUS
HAYSTACK.VLBI SAO.VLBI
J.RYAN T.CLARK
JPL.CDP UBONN.VLBI
KWAJ.VLBI WETTZELL.VLBI
M.JANSSEN
As a result of the removal of the CDP OMnet account, the
TELEX number for the Crustal Dynamics Project has changed.
The new TELEX number is 248496 NASCOM GBLT.
This section is designed to give brief notices of special
events, new data sets, or problems encountered in recent months.
The first GIG '91 data set, called the April 1 data set,
has been sent by JPL in RINEX format and archived in the CDDIS.
The sites included in this release are the 20 global Rogue
sites and two sites in Japan. These data span the January 22
through February 13, 1991 time period.
A local GPS survey of two Fort Ord, CA monuments (NCMN 7266
1981 and BRUSH 2) has been submitted by Bendix. These fourteen
15-minute observations span two days in May 1988 and were performed
using two Macrometer II receivers. The CDDIS has archived the
raw data from this experiment.
In addition to other SLR data processing changes, as of the
March 1991 A release, test sets of normal points for STARLETTE,
AJISAI, and ETALON-I and -II will be produced and distributed
to interested parties. Users should contact the CDDIS staff
if they wish to receive these test sets of normal points.
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