On-site personnel:
The AGO team consisted of Kevin Killilea (Field personnel/Groomer) and Tom Barfield and Joe Kujawski (AGO technical service team).
 

Station:
The station was cold upon arrival.  The AGO lost function due to a blockage in the air intake.

The technical service team successfully started the thermo-electric generator and raised the station temperature to 17-22øC.  That temperature was maintained throughout the service call.

The CAGOSYS upgrade was completed.  Additionally, a 100 lb propane cylinder located outside the AGO shelter was plumbed for cooking.

AGO-2 was originally targeted to be raised this year.  However, the station did not seem to have experienced a large amount of snow drifting around the  AGO.  NOTE: Station can be raised 6-12" without lowering the station.
 

TEG:
The TEG was upgraded to add a forced combustion air delivery system, called the Turbo, and to make it compatible with the new station configuration.  Additional noise suppresion (capacitors and inductors) were added to the Turbo electronics to reduce EMI to an acceptable level.

Batteries for the electronic shutoff valve were changed.  Manifold propane pressure was set to 3.5 psi.  The maximum burner temperatures that could be achieved are:
#1: 215 C, #2: 230 C, #3: 225 C, #4: 285 C, #5: 210 C, #6: 260 C.

The station had one full tank of propane and one partial tank of propane left after the shutdown.
 

Data Control Unit (DCU):
CAGODCU Rev. 1 was installed.  Also installed were two Storage computers (Rev 2, SN: 006 and 014).

The optical disks containing data gathered during the past year were retreived and will be sent to Augsburg for processing.

Power Supply Controller (PSC):
CAGOPSC Rev. 2 was installed.  During installation the BAGOPRO board did not work properly (probably it was killed by static) and had to be replaced.  After installation, the BAGOEXP board was damaged through user error and had to be replaced.  The inductors on experiment channel 13 of this board were removed to be used in noise suppresion of the Turbo.

See AGO2.AGO for experiment power settings, priorities, and other station information.
 

Data Acquisition Unit (DAU):
All functions were normal when the unit was turned on.

Non-volatile random access memory was replaced.

The DAU was upgraded per CAGODAUM Rev 0.  See AGO2.AGO for DAU settings.
 

Global Positioning System Receiver (GPS):
The GPS was functional when the AGO electronics were turned on.
 

Bell Labs Fluxgate Magnetometer:
Data was examined to verify the operation and leveling of the magnetometer.   Due to the presence of a geomagnetic storm during the servicing, the biasing of the magnetometer was not adjusted.

The switch for the H axis 2000nT scale was replaced with the new switch provided by Lucent.

Settings for the magnetometer are:

Sensitivity : 1000 nT
H Offset    :     +  00 01 968
D Offset    :    OFF 00 00 000
Z Offset    :     -  02 05 186

The electronics were checked out per the servicing documentation.  The results
of the checkout were as follows:

Axis    Meter Out        DAU       Save File
         Reading       Reading        Name
 H:     -10.000 V       003 H     A299_FLH.GIF
        +10.000 V       FFD H
 D:     -10.000 V       060 H     A299_FLD.GIF
        +10.000 V       F9B H
 Z:     -10.000 V       007 H     A299_FLZ.GIF
        + 9.831 V       FD4 H
        +10.000 V*      FF6 H                    * Scale adjusted to 10^3

During the service visit, it was discovered that the secondary ground on the
experiment was not connected to chassis.  This problem was corrected on day
319.
 

Tohuku ULF Search Coil:
All functions were normal.  Sample data was stored on the laptop harddisk.

During the service visit, it was discovered that the secondary ground on the  experiment was not connected to chassis.  This problem was corrected on day319.
 

Stanford VLF Receiver:

The Stanford experiment was not calibrated since the calibrator went to AGO-3.  Data was collected and examined for possible problems.  An error in ACAB009 was
discovered and fixed.

Settings for the experiment are as follows:
8-16 KHz        20
16-32 KHz       20
0.5 - 1KHz      20
4-8 KHz         20
24.0 KHz NAA    RF-20   IF-15
1-2 KHz NS      10
2-4 KHz         10
30-40 KHz       10
1-2 KHz EW      10
Line Receiver NS        30
Line Receiver EW        35
 

University of Maryland Riometer
The riometer checked out OK.  Portions of the (Magnetic) NW antenna are now buried.  See A299_RIO.GIF for collected data.
 

Penn State Seismic:
The seismic experiement had been disconnected over the last year since it was not functioning properly.  This year the instrument was upgraded to the new configuration which directly interacts with the AGO.

During the visit, the team programed the Data Acquisition System (DAS) to send the autocentering pulse at two minute intervals for a period of time.  By  doing this, the team did not have to excavate the vault to manually center  the instrument.  During testing, it was found that the instrument used up to  18 W during centering (which is not a problem), 11.4 W for three minutes every  hour (to read the GPS), and 6.83 W during normal operation.  Since it is using more than the allocated 5 W during its normal operation it was reduced to a  priority 3 experiment.  As a priority 3 experiment, it will be shut off before  the other experiments in the case of low system power.

A stomp test was performed at 318:45:20, 318:45:30, and 318:45:40.  This information was recorded and is saved as A299_AN4.GIF, A299_AN5.GIF, and A299_AN6.GIF.
 

Dartmouth LF/HF Receiver:
Data was collected and examined on the Dartmouth experiment.  Sample data can be seen in A299_LFH.GIF.
 

Allsky Camera:
The battery was replaced.  The allsky camera was upgraded to CAGOALLM Rev. 1. Since the calibration flashlight was not present, the AGO team took images of a covered camera (see A299_ALL.GIF).
 

Miscellaneous:
GPS position:  S 85 deg. 40'  W 46 deg. 24'. Elevation: 6100 feet.
 

Notes for the future:  None.