Data for Michigan City Meteorological Station:

LATITUDE:  41-43-43 N
LONGITUDE: 86-54-45 W
Site online: 12 Jun 2002, relocated to the light house 10/31/02 

Special thanks to the men and women of the USCG Station Michigan City for their technical and
financial support of this project.

Location: On the Michigan City harbor entrance light house.

Site Elevation: 176.0 m above mean sea level
Anemometer Height: 21.3 m above site elevation
Air Temp Height: 18.3 m above site elevation
Rain Sensor:  18.0 m above site elevation
UV and PAR sensors: 19 m above site elevation


Wind Sensor:  R.M. Young model 5103 Wind monitor mounted on a 12 foot mast which is clamped
to the light house deck railing.

Temperature Sensor:  CSI model 107 thermistor mounted in a naturally aspirated gill type
radiation shield co-located on the Wind Monitor mast.

Rain Sensor:  Texas Electronics 525-WS tipping bucket rain gauge located ~5 feet above the
light deck level on a 8 foot mast located on the SSE side of the light.  This sensor is
obstructed on the NNW side. (added 5/19/04)

UV Sensor:  Apogee Instruments UVS-1008 located on the top of an 8 foot mast located on the
SSE side of the light at approximately the edge of the light deck roof.  This sensor is
partly obstructed on the NNW side. (added 5/19/04)

PAR Sensor:  Apogee Instruments QSO-15835 co-located with the UV sensor above.  This sensor
is partly obstructed on the NNW side.  Hemispherical sensor: max value about 2000 uE/m^2/s.
(added 5/19/04)

Processor:  CSI model CR510X.  This unit samples the sensors every 5 seconds and is  set to
an averaging interval of 5 minutes.  

Power:  The system is run from a 12A/hr gel cell battery which is maintained with with a 
battery charger powered from the AC supply to the light.

Scheme:  The CR10X is connected to a Campbell Scientific RF 400 900 Mhz SS radio modem which
links to another RF400 and a telephone modem located in the Michigan City Coast Guard
Station, approximately 2400 feet SSE of the light. The system is interrogated by a PC located
in Ann Arbor running the CSI LoggerNet software and a telephone modem every hour.  The data
set consists of three 5 minute data ensembles.  Averaging and interrogation intervals and the
system program are adjustable  remotely.  The system data rate is set to 9600 baud.

Data Line: The data line is comma delimited and consists of the following in order  from left
to right.

Station ID, Michigan City = 7
Year
Julian Day
Time, UTC
Voltage measured at CR10X
Solar Panel Voltage.  This is a dummy place holding value of -99
Panel (equipment compartment) Temperature, Deg C
Average air temperature, Deg C
Air temperature standard deviation, Deg C
Wind Speed minimum, m/s
Wind Speed maximum, m/s
Wind Speed, standard deviation m/s
Wind Speed, scalar average, m/s
Wind Direction, unit vector average, degrees from (0=north, 90=east)
Wind Direction, standard deviation, degrees.
Rainfall, mm/5 minute interval, minimum resolution of .254 mm (added 5/19/04)
PAR, uE/m**2/s (added 5/19/04)
UV,  uE/m**2/s (added 5/19/04)

-99 = missing/bad data

John Lane
USDOC-NOAA-GLERL
Marine Instrumentation Laboratory
5/19/04