Consistency and Quality of USNO Analysis Center Products
Abstract
The United States Naval Observatory (USNO) has participated in the International Global Navigation Satellite System (GNSS) Service (IGS) as an analysis center since 1997. This report summarizes the quality and consistency of USNO rapid and ultra-rapid submissions. The consistency of USNO's submissions has steadily improved over the years to where in 2007, they submitted 98% of the expected rapid and ultra-rapid products. The quality has improved as well, with current values reported as follows. After subtraction of a seven-parameter coordinate transformation, the median value of the weighted root-mean-square residuals of the USNO orbits with respect to (wrt) the IGS combined rapid orbits are 24 mm (USNO rapid) and 58 mm (USNO ultra-rapid). Polar motion: root-mean-square (RMS) residuals wrt the IGS final products are approx. 65 micro-arc seconds (rapid), 190 micro-arc seconds (ultra, past 24-h), and approx. 360 micro-arc seconds (ultra, 24-h predict). Polar motion rates (wrt IGS final products): approx. 180 micro-arc seconds/d (rapid), approx. 200 micro-arc seconds/d (ultra, past 24-h), and approx. 390 micro-arc seconds/d (ultra, 24-h predict). Planned improvements to accuracy include implementation of absolute antenna phase-center corrections and addition of more stations to processing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2007
- Accession Number
- ADA477317
Entities
People
- Christine Hackman
- Jeffrey Tracey
- Paul Barrett
- Peter Kammeyer
- Victor Slabinski
- William Wooden
Organizations
- United States Naval Observatory