April 20, 2018
USNO VLBI Intensive Solution i2010a
Presented here is the U.S. Naval Observatory's i2010a
analysis of 1.5 hr dual-frequency VLBI sessions carried out under the
auspices of the International VLBI Service for Geodesy and Astrometry
(IVS) Intensive Program. UT1 angles are determined for most sessions
between 2000 July 06 and 2010 January 25 using dual-frequency
observations obtained at 8.4 GHz (X-band) and 2.2 GHz (S-band).
The SOLVE batch control file
int2010a.cnt.gz was used to generate a least-squares solution with
an output spool file
int2010a.spl.gz. Note that this solution uses
Calc10 (see calc10.ps). Tabulated
below are the session values from this solution.
Earth Orientation Parameters
UT1 angle is determined for each session separately.
Differences of the i2010a UT1 angles with the IERS 05 C 04
|Plot of i2010a minus IERS 05 C04 ||PS
Linear Regression: bias = -3.4 +/- 0.3 micro-seconds at J2000
Linear Regression: rate = -4.2 +/- 0.2 nano-seconds/day
Residuals: w.r.m.s. = 16.0 micro-seconds
Residuals: chi2/ndg = 3.61
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