Deep space probes op de amateur banden - AMSAT-NL

Deep space spacecrafts
op de amateur banden
VHF-DAG EN SAT-DAG 25 APRIL 2015
ROB HARDENBERG, PE1ITR
Onderwerpen
-
Inleiding
MRO (2005)
LX0OHB-4M (2014)
Shin-en2 (2014)
Artsat2::Despatch (2014)
-
Deep Space Satellite Tracking
Doppler
Signaal sterkte
Antenne (Groundgain, Gain en G/T)
Ontvanger en SDR
PE1ITR
-
QRV sinds 1981
VHF – UHF
DX-ing
Satellieten (Oscar-10 .en verder.)
Contesten
Moonbounce
Mars Reconnaissance Orbiter
Gelanceerd op 12 augustus 2005 11:43UTC
Van: "John L. Callas" <John.L.Callas@jpl.nasa.gov>
Aan: <mars-net@alum.WPI.EDU>
CC: <jfitzgerald@alum.WPI.EDU>; <setho@mindspring.com>; <andrew_bachler@msn.com>
Onderwerp: [mars-net] MRO In Flight UHF Checkout
Datum: woensdag 17 augustus 2005 21:37
Dear Radio Amateurs,
The Mars Reconnaissance Orbiter (MRO) is on her way to Mars. As has been done before, we are planning an inflight checkout of the UHF relay system (Electra) on board MRO using the SRI 46-meter antenna at Stanford
University. The tests are planned for 2005-09-21 between approximately 14:30 and 16:00 UTC and 2005-09-22
between approximately 03:30 and 14:00 UTC. A revised and detailed timeline will be provided later. The
testing will involve only reception at Stanford at two UHF frequencies; no transmission from Stanford is
planned. The two frequencies to be exercised during these tests are 437.1 MHz and 401.585625 MHz. The
signals will be continuous wave (CW) with right circular polarization (RCP). Part of the test objectives will
be to map out the pattern of the UHF antenna on MRO, so signal levels will be varying. As a rough, "back of
the envelope", the estimated gain of the MRO UHF antenna will vary about 0 dBi and the UHF transmit power will
be approximately 10 watts.
As for the position, range and range rate for MRO, you can use the Solar System Dynamics "Horizons" web page
at: http://ssd.jpl.nasa.gov/horizons.html
You can select MRO from the list of target spacecraft and specify your own location. The tool allows you to
select various time intervals and output quantities (e.g., RA/Dec, Az/El, etc). More details about the tests
will follow, but I wanted to give you some information to get started thinking about listening in.
As always, thank you for your interest. Sincerely, John
Electra UHF Transceiver MRO (1)
Electra UHF Transceiver MRO (2)
MRO Traject
JPL Horizons

Telnet: horizons.jpl.nasa.gov : 6775

Procedure:

Select body -> MRO

select Ephemeris (E),

select observer coord@399,

5.4012, 51.4453, 20

select starttijd, eindtijd en interval

Select soort lijst

Mail naar je email adres
MRO Schedule
MRO Doppler
MRO Signaalsterkte Theoretisch
PE1ITR Satellite link calculation
v20060310
Parameters
Transmitter
tx power
tx ant gain
Pathloss
F
D
Receiver
Antenne gain
NF
Link Calculation
10 W
0 dbi
437 Mhz
14000000 Km
Beacon TX level
Beacon Ant Gain
Pathloss
24 dbi
0,7 db
40,00 dbm
0,00 dbi
230,13 db
24,00 dbi
Signal at preamp
Signal at Preamp
-23db signaal
Conversion from NF (db) to Noise Power from Pre-amp
Temp Preamp
50,72 K
Temp at Sky
70,00 K
Noise Power
Bolzman (Joule/Kelvin) 1,38E-23 k
Bandbreedte
2500 Hz
Noise Power
-166,13 dbm
-143,80 dbm
Expected Signal Level
Signal above Noise
in
-22,33 db
2500 Hz
MRO Event 2 14 miljoen km
MRO Event 3 14 miljoen km
MRO Event 4 14 miljoen km
MRO UHF test 437.100MHz
@ PE1ITR
@ N9AB
MRO ontvangst setup
DB6NT 0.35db PRE-AMP
2x 28 el DL6WU
MRO QSL Kaart
award
LX0OHB-4M
145.980 MHz
1w
JT65b modulatie
LX0OHB-4M
LX0OHB-4M
Tracking met WSJT
Shin-en2
Gelanceerd op 2014-12-03 samen met de Hayabusa 2.
Gebouwd door Kyushu Institute of Technology & Kagoshima University
Telemetrie Downlink 437.385MHz.
Output 0.8 Watts F1D Modulation
4FSK Signaal
Ook
437.505 MHz 0.1 W A1A baken (niet gehoord)
145.942 -> 435.270MHz.
4FSK
Deep Space Communication Experiment Probe
“Shin-En2”
Internal structure of the Probe
Appearance of the Probe
Copyright (C) Kyushu Institute of Technology &
Kagoshima University
Deep Space Communication Experiment Probe
25
“Shin-En2”
The particle pixel detector was equipped in the upper center of the internal structure.
It was covered with the transmitters and the receivers of the transponder system, the feeder link
system.
Copyright (C) Kyushu Institute of Technology &
Kagoshima University
Appearance of Shin-En2
Copyright (C) JAXA
Inside of Shin-En2
Copyright (C) Kyushu Institute of Technology &
Kagoshima University
4 70cm Antennes
Van links naar rechts:
• 16 el DK7ZB
• 15 el YU7EF
• 16 el LFA (G0KSC)
• 16el DL6WU (niet op
foto)
• Gain en G/T (gain
temperature)
70cm antennes
Vertical plane
Pattern
Groen: 15el YU7EF
Rood: 16el DK7ZB
Blauw: 16el DL6WU
G/T Ratio
G/T = vergelijkingsgetal voor de deugdelijkheid. Dit
wordt gebruikt om de ontvang eigenschappen van
een antenne systeem aan te duiden.
Formule: G/T = (Ga) - (10*log Ta)
Hoe positiever de G/T is, des te beter is de antenne.
De afspraak (DJ9BV) is om de ruistemperatuur op 30
graden elevatie te berekenen
70cm antennes
Groundgain
10m AGL
2m AGL
Shin-en2 – 750.000km
PE1ITR Satellite link calculation
Shinen2
v20060310
Parameters
Transmitter
tx power
tx ant gain
Pathloss
F
D
Receiver
Antenne gain
NF
Link Calculation
0,8 W
0 dbi
437 Mhz
2308134 Km
Beacon TX level
Beacon Ant Gain
Pathloss
24 dbi
0,7 db
29,03 dbm
0,00 dbi
214,47 db
24,00 dbi
Signal at preamp
Signal at Preamp
Conversion from NF (db) to Noise Power from Pre-amp
Temp Preamp
50,72 K
Temp at Sky
70,00 K
Noise Power
Bolzman (Joule/Kelvin) 1,38E-23 k
Bandbreedte
2500 Hz
Noise Power
-161,44 dbm
-143,80 dbm
Expected Signal Level
Signal above Noise
in
-17,64 db
2500 Hz
Shin-en2 - 2.308.134 km
ARTSAT2::DESPATCH
Gelanceerd op 2014-12-03 samen met de Hayabusa 2.
CW Downlink 437.325MHz.
Output 7w A1A Modulation.
Het baken is niet continue actief. Uitzendschema op Artsat webpagina.
Baken op batterijen. Niet meer Operationeel.
Artsat2::Despatch
Artsat::Despatch
Artsat2:Despatch
8w
437.325MHz
Tracking Artsat2::Despatch
Antennesystemen
432MHz Ontvanger
- DB6NT Pre-amp
- Funcube dongle
SDR
Linrad: SM5BSZ http://www.sm5bsz.com/linuxdsp/linrad.htm
Spectrumlab DL4YHF http://www.qsl.net/dl4yhf/spectra1.html
SDRsharp http://sdrsharp.com/
Linrad
Artsat2::Despatch 750000km
Artsat2::Despatch 2.215 miljoen km
Artsat2::Despatch 4.6967 miljoen km
Einde
Dank voor uw aandacht!
Vragen?
Download PDF
Similar pages