|
Projects
Hosted
Other Cool Stuff
Support Our Cause
|
| |
The Ilmari Project is not a Viestikallio Project, this just happened to be a place where we could host these web-pages...
SUPER ILMARI REALITY CHECK meeting nro 1
29.8.2002 AGENDA:
- meetings purpose
- selection of the secretary
- review of the previous meeting - a PPT presentation on web
- Amsat-oh email list
- Interview session of Pauli, OH2DV, and its doers
- Retrieving of remainders of previous Ilmari (XIX) and OH2DV's documents from OH6VM
- Reports from various sub-project leaders:
- is any help needed ?
- is something not proceeding smoothly ?
- Things to be thought about:
- Ilmari chassis will be a test-bed for RATS-SAT technology
- A turnstile antenna for 70 cm
- thermal blanket out of self-assembled kapton/aluminium foil and kapton-tape
- space usable components
- PR value: Ilmari is RATS-SAT test platform
- release mechanism - does somebody want to experiment ?
- nylon line system, could be used for RATS-SAT antenna release
- prototype
- translator mass must be under 200 grams.
- GPS-rx to be prototyped well in advance, unnecessary extras to be removed, antenna to be lab-tested (ceramic patch-elements to be weighted, ground-plane shape and size are critical), is there willingness to lab own patch antenna ? (Who ?)
- Next meeing venue:
- who can sponsor ?
- location ?
- time ?
- hardware to be shown at the next meeting ?
Log notes from the meeting:
- Logger: OH1MQK
- Present were: OH2LH, OH2BGN, OH6DD, OH2MW, OH2JCP,
OH3JAJ, OH2JIU, OH2JBB, OH3UW, OH2KW, OH1MQK
- We have received instructions on the license application process from FICORA, but nothing yet from Finnish Civial Aviation Authority.
- OH3UW: "APRS Tx from Vaisala sondes has problems from 70cm synthetizer phase noice..."
- About the balloon flight:
- Latex balloons will expand, until they burst.
- Kevlar-palloons will not expand, thus it is possible to reach desired altitude fairly quickly, and then to "float" at that altitude.
- We want limited duration flight, nothing like NASA's "month(s) in the sky to navigate around the pole."
- Practical maximum flight distance is 200-300 km, and duration is under 4 hours.
- Possibly flight at the SRAL summer meeting camp from somewhere in the up-wind side of the camp, and with maximum altitude somewhere in camp's vinicity.
- Insulated box model "Tapola" - inner dimenstions 20x25x40 cm. Inner volume roughly 20 dm³ (liters). MASS UNKNOWN (350g)
- APRS TX Frequency: 437.850 MHz ?
- Construction details:
- A sub-frame on which actual modules will be glued ?
- Tasks:
- Nylon line pyros, 70cm→2m Xlator, ATX-TX + keying: Vesa, OH2JCP
- OH2DV interview: OH2MW, OH2AUE, OH1MQK
Estimating the mass budget:
Lahtivirta assembled attached mass and energy budget table:
| SUPER ILMARI Mass Budget Estimation; 2002-Aug-29 |
| Payload | Volume/ cm3 | Mass/ g | Power consump- tion/ mW | Voltage/ V |
|
| 1 |
Linear translator | |
200 |
5000 |
12 |
| 2 |
GPS RX |
|
20 |
150 |
3 |
| 3 |
GPS Antenna | |
50 |
|
|
| 4 |
1,3GHz ATV TX (1.280 Ghz ?) |
|
100 |
5000 |
12 |
| 5 |
Video camera | |
50 |
1200 |
12 |
| 6 |
3,5MHz beacon |
|
50 |
200 |
12 |
| 7 |
MIM |
|
50 |
100 |
5 |
| 8 |
Radar reflector | |
50 |
|
|
| 9 |
"Ilmari chassis + harness" | |
300 |
|
|
| 10 |
1,3 GHz antenni big wheel? |
|
50 |
|
|
| 11 |
144 MHz turnstile antenna | |
100 |
|
|
| 12 |
432 MHz antenna: 4x phased verticals | |
100 |
|
|
| 13 |
436 MHz antenna: a 1/4 wave GP | |
50 |
|
|
| 14 |
3,5Mhz antenna: a 1/2 wave wire dipole | |
300 |
|
|
| 15 |
telemetry sensors | |
10 |
|
|
| 16 |
Cablings | |
300 |
|
|
| 17 |
Connectors | |
100 |
|
|
| 18 |
Ilmarin box model "Tapola" | |
100 |
|
|
| 19 |
Power converters | |
100 |
|
|
| 20 |
Ropes | |
50 |
|
|
| 21 |
All manner of fixing stuff | |
150 |
|
|
| 22 |
70cm APRS TX (437.850 ?) |
|
100 |
500 |
12 |
| 23 |
2 x Nylon line cutters + control electronics | |
50 |
|
|
| 24 |
Batteries | |
1000 |
|
|
|
| |
20000 |
3430 |
12150 |
|
|
