1 / 11

WASHINGTON CORRELATOR UPDATE

WASHINGTON CORRELATOR UPDATE. KERRY KINGHAM Washington Correlator U.S. Naval Observatory. Current Status. 16-station Mark 4 correlator with 8 Station Units Primary mission remains rapid processing IVS-INTENSIVES IVS-R4 CRF, TRF, APSG CONT, etc 3rd HVAC rebuild actually works!

morton
Download Presentation

WASHINGTON CORRELATOR UPDATE

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. WASHINGTON CORRELATOR UPDATE KERRY KINGHAM Washington Correlator U.S. Naval Observatory

  2. Current Status • 16-station Mark 4 correlator with 8 Station Units • Primary mission remains rapid processing • IVS-INTENSIVES • IVS-R4 • CRF, TRF, APSG • CONT, etc • 3rd HVAC rebuild actually works! • Finally controls humidity for (obsolete) tape drives • Kept humidity under control during a major water leak

  3. Current Status (continued) • Staff • VLBI Scientist • VLBI Scientist backup (part-time) • Correlator Manager • 5 operators/logistics • 80 hours of processing per week • Reduced from 136 hours/week • Still keeping up with processing

  4. Progress • Mark 5 • 8 operational Mark5A playbacks • 4 working tape drives (as long as they don’t break) • Almost all Mark5 processing • DSN, Yellowknife, Simeiz, etc. still using tape • Processing Factors reduced dramatically • R4 = 0.9 (formerly 1.5) • T2 = 3.5 (formerly 5-6) • C05 = 3.25 (estimated 4.5) • Unattended operation

  5. Large Experiments • T2: expanded up to 16 stations • Startup could have been better • Present processing much smoother • software improvements • management improvements • CONT05 • Would still be being processed if not for Mark 5 • PF of 3.2 • Good test of Correlator procedures and software! Progress (continued)

  6. Progress (continued) • eVLBI • Operations: • Wettzell sends daily Intensive observations to ISI-E • Pickup and transport to USNO every 2 days • Kokee ships disks which arrive in 2 days • 1 to 2 days saved • Problems: • Success-rate 85% • Multiple problems, no quick fix • Transport • Network problems • Upgrades at ISI-E • etc

  7. S-Band Power Spectra of Two North-American Stations (CONT05)

  8. Cross-Power Spectrum is Contaminated!

  9. IRIS A NAVNET NEOS A IVS R4 IRIS Intensives NEOS Intensives IVS Intensives NAVEX APSG CRF CRDS SURVEY GPS GAPE NAPS GTRF WPAC PPM APT POLRN GGBL SOUTH IVS R1 IVS T2 CORE CONT Washington VLBI Correlator began routine operations on February 3, 1986(20 Years!)

More Related