The ST-21 is a Service Argos-certified Platform Transmitter Terminal (PTT ) that transfers data from the datalogger site to the Argos Data Collection and Location System via NOAA polar orbiting satellites.
Features:
Well-suited for remote meteorological and environmental data-collection applications, including mobile and high-latitude installations
Compatible with CR6, CR800, CR850, CR1000, and CR3000 dataloggers
Provides uplink capability for up to eight unique ID codes, frequencies, and repetition periods
Supports up to seven independent Argos data buffers that can be populated in real-time
Transmits variable-length Argos messages with either 20- or 28-bit ID codes
Allows researchers to forgo a rigorous certification process
Includes an autorepeat feature that allows the ST-21 to repeat data without host intervention
Provides a fail safe feature that alerts users upon communication link or host failure
Allows the ID and repetition rates to be set in real-time or by Campbell Scientific
