COVER LETTER FOR HIPPARCOS FRAME-TIE VLBA

        EXPERIMENT BL2 ON FEBRUARY 12, 1994, 11:30 - 20:30 UT 


Wavelength:              3.6 cm  (8402.99 - 8430.99 MHz)

Polarization:            RCP

Observing mode:          Mk-III, Mode B

VLBA antennas used:      BR, FD, and NL 

Non-VLBA antenna used:   Goldstone 70-m  (DSS-14)

Weather information is needed.  Pressure, temperature, and humidity
(or dew point) once per hour is adequate.

During the experiment, Jean-Francois Lestrade will be at JPL (phone:
818-393-2657, fax: 818-393-6890, e-mail: jfl@logos.jpl.nasa.gov).  The
control room at Goldstone can be reached at 619-255-8235 or 619-255-8230.
If there are questions about the schedule file, contact Dayton Jones 
at JPL (phone: 818-354-7774, e-mail: dj@bllac.jpl.nasa.gov).

Recorded VLBA tapes should be shipped to Haystack:

                             Norm Donald
                             Haystack Observatory
                             Off Route 40
                             Westford, MA. 01886

Observing logs and calibration information should be sent to:

                             Dayton L. Jones
                             J.P.L., 238-332
                             4800 Oak Grove Drive
                             Pasadena, CA. 91109

			     dj@bllac.jpl.nasa.gov

Thanks very much for your help.
                                 Dayton Jones


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   VLBA tape change times:   Start of first tape:  11:30 UT.
			       End of first tape:  19:32 UT.

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