inches, a freezing precipitation detector, and a day/night
illumination sensor are not shown in figure 2-1. The
ASOS will provide station pressure, sea level pressure,
pressure altitude (PA), and density altitude (DA)
values. Also, additional sensors may be added to the
package at a later time.
Operation and Maintenance
Detailed instructions on the operation and
maintenance of the sensor package are provided with
the manufacturer’s User’s Manual supplied with each
installation.
SHIPBOARD METEOROLOGICAL AND
OCEANOGRAPHIC OBSERVING SYSTEM
(SMOOS)
The Shipboard Meteorological and Oceanographic
Observing System (SMOOS) is an add-on system of
supplemental shipboard sensors for the Tactical
Environmental Support System (TESS). The
“Observer” function in TESS provides the ability to
enter local environmental observation data, construct
observation report messages, review received
messages, and correct erroneous data.
The SMOOS is a suite of environmental sensors
that provide continuous automated measurement of
meteorological and oceanographic parameters. The
sensors automatically send the data to TESS, where it is
processed, error-checked, displayed, and distributed.
The observer may supplement or override data from the
automatic sensors.
SMOOS will input data from
shipboard wind speed and direction transmitters and
from the following sensors:
Atmospheric pressure sensor
Temperature/dew-point sensor
Cloud height detector
Visibility sensor
Precipitation sensor
Seawater temperature sensor
Operation and maintenance manuals are provided
with each installation. Now let’s briefly discuss the
sensors.
Atmospheric Pressure Sensor
The atmospheric pressure sensor assembly is
shown in figure 2-2. It is a digital barometer mounted in
a weatherproof case with shock protection. It has an
accuracy of l l.O hectopascal (hPa) within a range of
860 to 1,060 hPa.
Figure 2-2.—SMOOS atmospheric pressure sensor.
Temperature and Dew-Point Sensor
Figure 2-3 shows the combined temperature/dew-
point sensor. The dew-point sensor is a fan-ventilated
Figure 2-3.—SMOOS temperature/dew-point sensor.
2-3
