SEC/RPC HIDIVE Configuration

The monitoring systems collecting data for the NASA LWS HIDIVE project consist of the following equipment:

SEC Providence: Icom IC-R75 HF receiver and Linux PC from December 2002 through November 12 2003; changed to Icom IC-718 HF transceiver with Linux PC on November 12 2003
SEC Bear Lake Observatory: Icom IC-R75 HF receiver and Linux PC
Klamath Falls: Icom IC-R75 HF receiver and Linux PC; data archived on CD-ROM

The location tags on the data files and plots identify the equipment used so the tags for SEC Providence change even though the location is the same. The following list identifies the location and equipment types:

KF: Klamath Falls, Oregon; Icom IC-R75 HF receiver and Linux PC with inverted-V folded dipole antenna
BLO: Bear Lake Observatory; Icom IC-R75 HF receiver and Linux PC with flat folded dipole antenna
- Operation began November 19 2003
- Switched to loop antenna with preamplifier for comparison purposes January 17-24 2004; note higher 2.5 and 20 MHz noise levels during this period
- Antenna mast was damaged by a windstorm, lowering the antenna from March 6-25 2004. Some noise may be noted between about 1600-1800 UT as the antenna was raised.
- PC hardware problems caused data outages from November 7-20 2004, when the repaired system was re-installed.
SEC: Providence; Icom IC-R75 HF receiver and Linux PC...
- December 2002-November 12 2003: using inverted-V trapped dipole
- November 12-19 2003: using windom antenna
- November 19 2003: system moved to BLO; new SEC system data tagged PRV
- Lost AGC data from 1500 UT June 11 2003 through 1600 UT June 16 2003; signal levels in this period are not correct.
- Signal dropout around 1700 UT October 24 2003 is due to the antenna wire being disconnected and relocated.
PRV: Providence; Icom IC-718 HF transceiver and Linux PC...
- October 20-November 10 2003: using windom antenna
- November 12 2003 onward: using inverted-V trapped dipole from previous SEC system
- Lost time synchronization during the week of November 8, causing confusion of WWV/WWVH tones; corrected November 17 2004.

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