ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Ground SegmentHAM TV standard
The effects of the off-Nadir orientation of on-board
ARISS-41 and ARISS-43 antennas
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
#43
#41
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
#43
#41
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
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Effects of the onboard antenna Off-Nadir Anglefor a pass with Max Elevation = 64°
QEF threshold
Off-Nadir angle = 9° (#43)SR = 2.0 MSym/sG/T = 2.0 dB(1/K)
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
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Effects of the onboard antenna Off-Nadir Anglefor a pass with Max Elevation = 64°
4’:51’’
AOTLOT
Off-Nadir angle = 9° (#43)SR = 2.0 MSym/sG/T = 2.0 dB(1/K)
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
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Effects of the onboard antenna Off-Nadir Anglefor a pass with Max Elevation = 64°
5’:38’’
Off-Nadir angle = 9° (#43)SR = 1.3 MSym/sG/T = 2.0 dB(1/K)
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
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Off-Nadir angle = 9° & 13°SR = 1.3 MSym/sG/T = 2.0 dB(1/K)
Effects of the onboard antenna Off-Nadir Anglefor a pass with Max Elevation = 64°
400 600 800 1000 1200 1400 1600 1800 2000 2200 24000
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Tim
e [s
]5’:31’’5’:05’’
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Off-Nadir angle = 0° & 13°SR = 1.3 MSym/sG/T = 2.0 dB(1/K)
Comparison between Nadir and Off-Nadir pointing antennas: Best performances with Off-Nadir mounting, which exploites maximum gain at larger ranges.
Max El.=40°
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Conclusions
Off-Nadir mounting increases link duration
From this point of view the 13° (#41 TBC) is the best
13° offset antenna allows 4’:31’’ @ 2.0 MSym/s and 40° pass, using a HAMTV standard station. i.e. 1.2 m, G/T=2.0 dB(1/K)
13° offset antenna allows 5’:31’’ @ 1.3 MSym/s and 40° pass, using a HAMTV standard station. i.e. 1.2 m, G/T=2.0 dB(1/K)
Higher passes allows longer duration, but impose stronger constrain on tracking (greater Az. Speed). A 64° pass allows 5’:03’’ and 5’:52’’ respectively.
The effects of the off-Nadir orientation of on-board ARISS-41 and ARISS-43 antennas
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
0 1 2 3 4 5 6 7 82
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G/T dB(1/K)
y (d
B)
Sun Flux: 138 SFU at 2.4 GHz at April 2, 2014, 1200 UTC @ San Vito
2369 MHz2395 MHz2422 MHz2437 MHz
G/T measurement and Rotator setup
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
:Product: Solar Radio Data rad.txt:Issued: 0612 UTC 05 Nov 2012## Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center# Please send comments and suggestions to [email protected]# Units: 10^-22 W/m^2/Hz# Missing Data: -1## Daily local noon solar radio flux values - Updated once an hour# Freq Learmonth San Vito Sag Hill Penticton Penticton Palehua Penticton MHZ 0500 UTC 1200 UTC 1700 UTC 1700 UTC 2000 UTC 2300 UTC 2300 UTC 2012 Nov 4 245 18 18 18 -1 -1 19 -1 410 36 38 37 -1 -1 34 -1 610 55 -1 54 -1 -1 57 -1 1415 78 81 74 -1 -1 78 -1 2695 87 97 88 -1 -1 87 -1 2800 -1 -1 -1 95 95 -1 95 4995 131 137 130 -1 -1 123 -1 8800 266 270 271 -1 -1 259 -1 15400 542 518 576 -1 -1 568 -1
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Level Chart for HAMTV
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
One of the first proposed examples of chained stations (from Document AMSAT Italy GSO R1.1, 13/04/ 2012)
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
One of the first proposed examples of chained stations (from Document AMSAT Italy GSO R1.1, 13/04/ 2012)
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Measured RF performances during commissioning
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Measured RF performances during commissioning
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Measured RF performances during commissioning
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
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Our model prediction: commissioning step 2, 12:44:20 UTC, Matera station. C/N =44.5 dB at 2.0 MSymb/s, Off-Nadir 9°, range 625 km, G/T=25.7 dB(1/K).
Measured RF performances during commissioning
G/T of Matera RX was measured the day before using Cassiopeia A as a calibrated noise source
ARISS meeting ESTEC 2014HAM Video
ARISS International Delegates Meeting, April 3 - 5, 2014 – ESA ESTEC
Thank you
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