DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS SYSTEM PRESENTATION - CNES
• Responses to CLS User survey• Synthesis of NOAA User consultation• Anticipated Argos-4 needs• ARGOS-3 :• * System Heritage• * Commissioning• ARGOS-4 System : Preliminary Overview
DBCP Workshop October 2006 ARGOS-4 CNES
RESPONSES TO CLS USER SURVEY
DBCP Workshop October 2006 ARGOS-4 CNES
SURVEY CONTEXT
1604 surveyed customers 238 replies Replies per application
DBCP Workshop October 2006 ARGOS-4 CNES
USER SATISFACTION
32%
55%
6%
2%
0%5%
Biologists
38%
45%
10%
1%
1%
5%Meteo/Ocean
24%
33%10%
2%
0%
31%
43%
36%
11%
1%0%9%
Argos services
Client support
GLOBAL
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS SYSTEM METEO / OCEAN (1/2)
System reliability
52%41%
6%
0%
1%
0%
# satellites - Timeliness
28%
47%
17%
6%
1%
1%Data volume
24%
33%
22%
15%
1%
5%
Global Global
Main users Main users
DBCP Workshop October 2006 ARGOS-4 CNES
SYNTHESIS OF NOAA USER CONSULTATION
DBCP Workshop October 2006 ARGOS-4 CNES
QUESTIONNAIRE
• Distribution and Coverage How many DCPs? Where?
• Timeliness How often transmit/receive to each DCP? Latency requirements? Direct read-out?
• Link Reliability Importance for transmit Importance for receive
• Throughput How much data on each transmit /
receive?• Geolocation
Use of Doppler geolocation Use of GPS
• Portability Antenna size? Volume and mass?
• Future Tradeoffs
• Argos DCS study report was issued on december 7,2005
• Questionnaire was issued to 33 people
• 20 responses received :– 5 ocean– 11 biologists– 4 DCP manufacturers
DBCP Workshop October 2006 ARGOS-4 CNES
CONCLUSIONS
• Survey responses indicate that next-generation of Argos DCS should focus on– Improving DCP transmit performance: increased data volumes with
reduced size, mass and power
– Improve Doppler geolocation to < 150m with a target of <50m
• An order-of-magnitude improvement in data volumes and cost would make Argos DCS attractive to a new class of users
• Argos system is not adapted to applications generating large amount of data per hour
DBCP Workshop October 2006 ARGOS-4 CNES
ANTICIPATED ARGOS-4 NEEDS
DBCP Workshop October 2006 ARGOS-4 CNES
17032
10781
4467
16290
2000
4000
6000
8000
10000
12000
14000
16000
18000
jan
v-96
jan
v-97
jan
v-98
jan
v-99
jan
v-00
jan
v-01
jan
v-02
jan
v-03
jan
v-04
jan
v-05
jan
v-06
Total ARGOS
Total Science
Total Fishing
Total Sensitive Use
NUMBER OF ACTIVE PLATFORMS IN THE SYSTEM
Average growth > 12% per year
DBCP Workshop October 2006 ARGOS-4 CNES
NEED FOR ADDITIONAL CAPACITY
Need for more than 15 Erlang
capacity
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS USER NEEDS FOR ARGOS 4
• KEEP COMPATIBILITY WITH ARGOS-2 & ARGOS-3 PMTs
• INCREASE AUTONOMY & REDUCE SIZE- Tx power drain decrease: factor 2
- Rx power drain : constant for increased capacity
- Size & weight decrease : factor 2
• INCREASE DCP DENSITY:- Doubled number of platforms among which 25% are @ 4800 bps
- Increase data volume transmission per pass : up to 100 kb per pass
• IMPROVE LOCATION : 50 to 150 m
• BETTER TIME RESPONSE : Average < 30 min
• INCREASE DOWNLINK DATA VOLUME : > 1,2 kbps
DBCP Workshop October 2006 ARGOS-4 CNES
SATELLITE TRANSITION SCHEDULE
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW (1/10)
Average timeresponse (min)
Maximum Holeper day (hours*)
55 2.5 < MH < 4.7
66 2.9 <MH <3.7
• BASIC SYSTEM CONSTELLATION- Reference constellation: NOAA-K, L, M & N
- NPOESS-C1, C2 and METOP (3 main guaranteed orbits)
* at equator
Time response (min)
0
10
20
30
40
50
60
70
0 20 40 60 80 100
latitude (°)
NPOESS-C1, C2 & METOP
NOAA-K, L, M & N
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW (2/10)
Average timeresponse (min)
Maximum Holeper day (hours)
55 2.5 < MH < 4.7
66 2.9 <MH <3.7
• IMPROVEMENT IDEAS- Satellite orbit control
- NPOESS-C1, C2 and METOP + 1 equatorial orbit satellite
* at equator
Average timeresponse (min)
Maximum Holeper day (hours*)
55 2.5 < MH < 4.7
66 2.9 <MH <3.7
30 1.6 < MH < 1.7
Time response (min)
0
10
20
30
40
50
60
70
0 20 40 60 80 100
latitude (°)
NPOESS-C1, C2 & METOP+ Equatorial
NPOESS-C1, C2 & METOP
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW (3/10)
Average timeresponse (min)
Maximum Holeper day (hours*)
55 2.5 < MH < 4.7
66 2.9 <MH <3.7
30 1.6 < MH < 1.7
14 0.7 < MH < 0.8
• IMPROVEMENT IDEAS- Satellite orbit control
- NPOESS-C1, C2 and METOP + 2 equatorial orbit satellites
* at equator
Time response (min)
0
10
20
30
40
50
60
70
0 20 40 60 80 100
latitude (°)
NPOESS-C1, C2, METOP +2 Equatorial
NPOESS-C1, C2 & METOP+ Equatorial
NPOESS-C1, C2 & METOP
DBCP Workshop October 2006 ARGOS-4 CNES
Data throughput• STD + NG/400 bps: low power Tx• HD/4800 bps: 10 msgs - 50 kbits per pass
Tx power: 5 W
Capacity: • 12 processing units (3 HD)• 110 kHz frequency bandwidth
Two-way link (400 bps)
ARGOS 3
ARGOS 4
Data throughput• STD + NG/400 bps: low power Tx• HD/4800 bps: 30 msgs -140 kbits per pass
Tx power: 3 W
Capacity: • 40 processing units (10 HD)• 400 kHz frequency bandwidth (TBC)• Processor speed x 30
Two-way link (3 x 400 bps TBC)
ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW
DBCP Workshop October 2006 ARGOS-4 CNES
ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW
• ARGOS-4 PLANNING (TBC):
- System study until spring of 2007
- Phase A study: until end of 2007
- Phase B: beginning of 2008
- First Flight Model provided in 2011