Metadata for NOAA/GLERL Chicago, IL Met Station

Data for Chicago Meteorological Station:

LATITUDE:  41-55 N
LONGITUDE: 87-34 W
Site online: 03 Aug 2000

LOCATION:  On the Harrison-Dever Crib, approximately 3 miles offshore from the City of Chicago.

Site Elevation: 176.0 m above mean sea level
Anemometer Height: 25.9 m above site elevation
Air Temp Height: 22.9 m above site elevation

Wind Sensor:  R.M. Young model 5103 Wind monitor

Temperature Sensor:  CSI model 107 thermistor mounted in a naturally aspirated gill type
radiation shield.

Note:  Sensors were calibrated/serviced 3/06

Processor:  CSI model CR10X.  This units samples the sensors every second 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 a Yuasa charger
from the available AC line.  This system will provide 5 days of operation should AC power fail.

WebCam Image:  We are using a Sony SNC-Z20N camera working through a CDMA modem.  The image is
736x480 and is updated every 60 minutes.  The CDMA modem serves both the webcam and the met
system.

Scheme:  The CR10X is connected to a BlueTree Wireless CDMA RF modem.  Functionally this system
represents wireless IP.  The system is interrogated by a PC from Ann Arbor running the CSI
LoggerNet software very 15 minutes.  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 space delimited and consists of the following columns in order from 
left to right.

1:Station ID, Chicago=4
2:Year
3:Day of Year
4:Time, UTC
5:Average air temperature, Deg C
6:Wind Speed average m/s
7:Wind Speed maximum, m/s
8:Wind Direction, average, degrees from (0=north, 90=east)

John Lane
USDOC-NOAA-GLERL
Marine Instrumentation Laboratory
6/30/06