Campbell SAT ARGOS Manual de usuario descargar pdf (Pagina 108)

ZENO

-3200 USER MANUAL

Coastal Environmental Systems (206) 682-6048

Page 100

6.6.7. Data Packetization

To ensure that a complete message is sent between a ZENO

-3200 and a host with a radio (usually a

Coastal Environmental System Base Station), the ZENO

-3200 “packets” each message using bracket

characters, {{{{{ and }}}}}, at the beginning and ending of each packet. ZENOSOFT

strips the

packeting characters so that you won't see them in any ZENO

-3200 messages.

If you are using two-way radio communication and you see the characters

{{{{{ or }}}}} appear on your screen, it probably means you are using a

Base Station set for one-way radio communication only.

6.7. GOES SATELLITE COMMUNICATIONS

The ZENO

-3200 data logger can transmit data through the GOES

122

satellite system operated by the

National Environmental Satellite, Data and Information Service (NESDIS) of the National Oceanographic

and Atmospheric Administration (NOAA). The GOES system provides 232 channels for users to up-link

messages.

123

A typical assigned transmit window of 1 minute allows 355 bytes of data to be sent,

allowing for preamble and 15 second guard bands.

Data messages sent to the GOES transmitter are limited to 355 bytes.

Coastal Environmental Systems uses either the Telonics TGT-1 GOES transmitter or the Campbell

Scientific SAT HDR GOES transmitter. Both self-timed (regular) and random transmissions are

supported in either clear-text (ASCII) or compressed (binary) format. Self-timed transmissions are

generally used for routine monitoring, typically every three to four hours. Random (or emergency)

transmissions are used to report on unusual or critical conditions.

Self-timed and random transmissions cannot be used concurrently.

6.7.1. Obtaining GOES Channels

Before you can use a GOES radio, NESDIS will assign channels and time windows for self-timed and/or

random transmissions to you. Different channels are used for self-timed and random transmissions, so

that the self-timed transmissions are not overwritten by the random transmissions.

You must send your self-timed or random transmissions within the one-

minute time window assigned by NESDIS.

GOES users are primarily US based government agencies, and private US and non-US users when

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Campbell SAT ARGOS Manual de usuario Pagina 108