Diapositiva 1

1
Long Duration Balloon flight from polar
regions (Peterzen et al. ESA Symposium 2003
ESA-SP530 St. Gallen)
Flights from NSBF - USA (from Fairbanks,
Alaska) At similar latitudes, flights from
Kiruna (Sweden) Svalbard have higher latitude.
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
2
Long Duration Balloon flight from polar
regions (Peterzen et al. ESA Symposium 2003
ESA-SP530 St. Gallen)
Flights from NSBF - USA (from Fairbanks,
Alaska) At similar latitudes, flights from
Kiruna (Sweden) Svalbard are at higher latitude
(78-80N).
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
3
Svalbard launch tests
Test launch July 24, 2004 Feasibility of LDB
flight from Svalbard proved More than 40 days at
float IRIDIUM telemetry subsystem for OLIMPO
succesfully tested Solar panels/charge control
tested Forecasted OLIMPO LDB scientific balloon
flight in Summer 2006
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
4
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
5
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
6
Telemetry / TC / data acquisition for Long
Duration Balloon FlightsPolar flights are not
in Line of Sight.Solutiona) Satellite relay
telemetry / TC systemIridium TM/TC for
selected/compressed data (INGV, G.
Romeo/Phys.Dept)b) on-board full storagec) data
dump on selected ground stations
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi
7
Iridium

• 66 satelliti (6 ricambi già in orbita) a 780 km
• 100 minuti di periodo orbitale
• Frequenza comunicazione verso terra (utenza)
  1616..1625 MHz
• Frequenza satellite-satellite 23.18-23.38 GHZ
• Frequenza satellite-terra 19.4..19.2 GHz
• Frequenza terra-satellite 29.1-29.3 GHz
• Velocità di trasmissione per canale 2400 bps

8
Attuale telemetria basata su IRIDIUM
IRIDIUM data kit
IRIDIUM phone
rs232
antenna
rs232
RCM2000 main processor
Main processor monitor
Level adapter
rs232
Digital I/O
rs232
on-off phone
GPS receiver
antenna
adc board
Vessel temperature
scientific adc (unused)
Arm temperature
Solar array
Panels temperature
Panels voltage
Panels current
Battery voltage
8 channels igniter driver
To and from igniters
power supply
Charge controller
Low battery switch
Data monitor
battery
9
PEGASO layout
GPS Antenna
10 cm
IRIDUM Antenna
U0
Mechanical assembly
Temperature sensor
Boards description U0 IRIDIUM Telephone U1
CPU and GPS Receiver U2.1 Flux Gate (Ch1),
unused U2.2 Flux Gate (Ch2), unused U2.3 Flux
Gate (Ch3), unused U3 ADC board U4 power
supply U5 charge contoller U6 igniters
driver and tester
U1
U2.1
70 cm
U2.2
U2.3
Boards
U3
U4
U5
U6
Battery
Panels connector
Testing connector
Ballast / Release connector
Flux Gate Magn. conn.
10
Workshop ASI sulle Tecnologie ElettroOttiche ASI
14/10/2004 S. Masi