1 / 16

Epochs

Epochs. 20 0 mm -20. 1 2 3 4 5 Hours. Elevation angle and phase residuals for single satellite. Simple geometry for incidence of a direct and reflected signal.

liang
Download Presentation

Epochs

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Epochs 20 0 mm -20 1 2 3 4 5 Hours Elevation angle and phase residuals for single satellite

  2. Simple geometry for incidence of a direct and reflected signal Multipath contributions to observed phase for an antenna at heights (a) 0.15 m, (b) 0.6 m, and (c ) 1 m. [From Elosegui et al, 1995]

  3. Antenna Phase Patterns

  4. Top: PBO station near Lind, Washington. Bottom: BARD station CMBB at Columbia College, California

  5. Left: Phase residuals versus elevation for Westford pillar, without (top) and with (bottom) microwave absorber. Right: Change in height estimate as a function of minimum elevation angle of observations; solid line is with the unmodified pillar, dashed with microwave absorber added [From Elosequi et al.,1995]

  6. Correlation between estimates of height and zenith delay as function of minimum elevation angle observed (VLBI, from Davis [1986])

  7. Uncertainty in estimated height as function of minimum elevation angle observed (VLBI, from Davis [1986]; dotted line with no zenith delay estimated)

  8. GPS adjustments to atmospheric zenith delay for 29 June, 2003; southern Vancouver Island (ALBH) and northern coastal California (ALEN). Estimates at 2-hr intervals.

More Related