1. 16./17.12.2002ANIMATE Telemetry Meeting ANIMATE Telemetry Meeting

2. 16./17.12.2002ANIMATE Telemetry Meeting ORBCOMM Packet oriented data transfer Packet size < 300 byte recommended a stable end-end link is not required no real time data transfer possible Run Time (April-August 2002 one Message /Day) –max. delay 445h –average delay 67h –median 5,7h Run Time in November: –max. delay3.985h –average delay0.140h –median0.024h

3. 16./17.12.2002ANIMATE Telemetry Meeting

4. 16./17.12.2002ANIMATE Telemetry Meeting ORBCOMM Hardware Panasonic Transceiver KX-G7100 / KX-G7101 used 2m Band / ~137MHz Antenna cable length up to 50 m Different Antennas available Current consumption @24V (KX-G7100 / KX-G7101): –sleep1.2mA / 1.2mA –receive 35mA / 120mA –send600mA / 700mA

5. 16./17.12.2002ANIMATE Telemetry Meeting IRIDIUM Online Connection, not packet oriented Bidirectional real time data transfer Very stable Connection Reliable access / good satellite coverage Online Prices compare able to GSM 1.5€/min Voice, 0.5€/min Data Iridium Modem ~1000€ / Handy ~3000€ Data rate 2400 bps, but stable Iridium tested for 5 Weeks (NAL modems) on Poseidon north of Island –E-Mail purposes on Uni-Bremen Mail server –login every Day 2 to 5 times / every time login at first attempt SMS like Data Service available (yet no experiences)

6. 16./17.12.2002ANIMATE Telemetry Meeting Iridium Hardware Handy’s and Modems available Frequency 1,6GHz NAL Modem Power consumption @5V –receive 150mA –sending 300mA short antenna cables required < 5m Different antennas available (Mast- Magnetic mount- Antenna etc.) Handy’s with modem Adapter available and reliable

7. 16./17.12.2002ANIMATE Telemetry Meeting

8. 16./17.12.2002ANIMATE Telemetry Meeting

9. 16./17.12.2002ANIMATE Telemetry Meeting Nutrient Analyser NAS-2E Serial Interface: RS232 Data will be sent as an online data stream Data Format S-NO3-SW ALG 14:47:39 3 3.758 12.513 1 4.096 14:50:38 4 1.757 12.513 1 4.096 No commands possible A data logger is necessary to record all the data and to create the data packets for transmission