Campbell SAT ARGOS, Инструкция по эксплуатации

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1
SAT ARGOS
1. Overview
This Service Argos certified PTT satellite transmitter is well suited for remote
data collection applications. Service Argos data transceivers fly aboard two of
NASA’s polar orbiting satellites. Argos carrier frequency is 401.650 MHz.
With an orbit altitude close to 800 kilometers, the satellites are at a relatively
low orbit. The low orbit allows for a smaller antenna and power supply. The
orbit period is approximately 1 hour and 45 minutes for each satellite. This
orbit period allows hourly data transmission at extreme northern and southern
latitudes. Near the equator there are about six satellite passes per day, but they
are not evenly spaced. Each data transmission can include up to 32 bytes, or
16 Campbell Scientific data points. Data must be decoded by the user, or
Service Argos will decode the data for a fee.
The SAT ARGOS PTT supports up to four Argos ID numbers. Message repeat
intervals, Argos ID numbers and duty cycles can be changed with a simple-to-
use computer-based interface. The transmitter connects directly to the CS I/O
port using the standard SC12 ribbon cable. All power and input/output
connections with the datalogger are through the CS I/O port. Power
requirements are approximately 2 mA average current drain. The PTT will
start to transmit two minutes after power is applied. If the datalogger has not
sent data to the transmitter, a default message is sent. During configuration the
transmitter is disabled. Program instruction P125 is used to send final storage
data to the transmitter. The CR10X datalogger supports the SAT ARGOS.
Logan, Utah
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ARGOS TRANSMITTER
ASSEMBLED IN USA
SN:
ANTENNA
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A
T
ALOGGER
FIGURE 1-1. SAT ARGOS