February 12, 15 and 20, 2008
The 196th, 197th and 198th Nucleus upgrades were completed by Dain Delisimunovic (UNAVCO) at former SCIGN stations AZU1, VDCY and LORS.
AZU1 (Azusa, CA) and LORS (La Verna, CA) were upgraded with Trimble NetRS receivers and Proxicast cell modems. VDCY (Glendale, CA) was upgraded with a Trimble NetRS and brought on-line via an ethernet radio link to T1 line.
February 8, 2008 GR8R - Andre Bassett, David Finn, and Doerte Mann (PBO Northern California crew) and Ellie Boyce (Nucleus) upgraded the U. of Wisconsin site GR8V with a short drilled-braced monument and new DC Solar system. This "greater" site has a Trimble NetRS receiver and cell modem telemetry.
(left) Short drilled-braced monument with new enclosure and 3-panel mount - small solar panel mount provides power and houses equipment for GR8V, which continues to collect data. (right) GR8V monument.
November 15, 2007 VNDP maintenance - AC power failed due to a blown transformer, so Ellie Boyce and Beth Bartel (UNAVCO) and "Deeg"(Vandenberg Air force Base) installed a new DC solar power system. The station is back on-line as part of the UCSB radio network.
Built in 1992, VNDP is the third-oldest station in the PBO Nucleus network. The original installation was done as a collaborative project by SCRIPPS, JPL and MIT (the PGGA, Permanent GPS Geodetic Array, which later became part of SCIGN).
(left) "Deeg" (VAFB) with the new solar panels and equipment shed in background. (right) View of VNDP monument, looking south.
November 11-14, 2007
Ellie Boyce and Beth Bartel (UNAVCO) upgraded the 7 remaining Parkfield stations of the PBO Nucleus project, with help from Andy Snyder (USGS Parkfield). The old Ashtech receivers were replaced with Trimble NetRS and new IP-based telemetry was added.
The "hogs" telemetry group: GPS stations LOWS, RNCH and MASW transmit to a communications hub at HOGS.
(top left) The HOGS telemetry hub - GPS monument is inside the near-left corner of the fence. (top right) A new radio antenna is mounted at LOWS.
(lower left) Beth Bartel (UNAVCO) installs a new yagi at MASW. (lower right) Andy Snyder (USGS) and Beth Bartel (UNAVCO) upgrade RNCH.
The "hunt" telemetry group: GPS stations LAND, POMM and MIDA radio to a cell modem hub at HUNT.
(top left) Ellie Boyce (UNAVCO) installs a new radio antenna at the HUNT master. (top right) LAND is co-located with a USGS laser reflector - the shed now houses GPS and telemetry equipment.
(lower left) GPS and telemetry equipment in the POMM shed. (lower right) The GPS antenna at MIDA (radome just sticks above the roof of the shed) is mounted on top of the monument for the laser reflector tube.
The "minemountain" telemetry group: GPS station CAND radios to cell modem communications at MNMC.
(left) MNMC on Mine Mountain. (right) CAND is co-located with a USGS laser reflector - the shed now houses GPS and telemetry equipment.
October 22, 2007 SHLD, located in the Sheldon National Wildlife Refuge in northwest Nevada, was the final PANGA site to be upgraded into Nucleus. A Trimble NetRS receiver and VSAT communications were installed by Ellie Boyce and Sarah Doelger (UNAVCO).
(left) Deep drilled-braced monument at Sheldon Wildlife Refuge, with new VSAT dish in background. (right) New VSAT dish.
August-September, 2007
3 upgrades of EBRY network sites were completed by Dave Drobeck (U. of Utah):
HWUT,
OFW2 and
LMUT.
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