Baycom Modem !

A simple modem that functions the same as the classic "dumb" Baycom Modem.
For modulation a monolithic phase-locked loop (PLL) IC xr2211 used.
The demodulation  XR-2206  a monolithic function generator was used .
Calibrate the Mark tone 1200Hz at low TXDATA level , and
the space @ 2200Hz at high TXDATA .
Why do I need to build such an old style modem ?
1st because it a piece of the digital communication history .
2nd its a very good demo tool for the digital modulation topics.

NEE-01 Cubesat, TV Camera in Action .

NEE-01 Pegasus (Pegaso) the first HD TV CubeSats built in Ecuador launched on a CZ-2D rocket from the Jiuquan Space Center on Friday, April 26 at 0413 UT.

The 1U CubeSat (10x10x10 cm) was built in Ecuador and carries a 0.9 watt output 720p HD TV transmitter on 910 MHz.



EarthCam has teamed up with the Ecuadorian Civilian Space Agency to deliver what EarthCam describe as an amazing viewing experience from an orbiting satellite. You can view the NEE-01 Pegasus SpaceCam online at http://www.earthcam.com/world/ecuador/ecsa/
NEE-01 Pegasus (Pegaso) http://amsat-uk.org/2013/04/25/nee-01-pegaus-hd-tv-cubesat/
Source Amsat-UK

ESTCUBE-1 1st photo

THE FIRST PHOTO TAKEN BY ESTCUBE-1 IN SPACE has been released today by the ESTCube-1 team!



ESTCube website

USB VOX

USBVOX

Enjoy your favorite music and save a com port, if there any port !
USB sound-card + a handful discrete components  .
Works with any digital software .

CUBEBUG-1 & Soundmodem 2

Three frames decoded from the same CUBEBUG-1 audio file Mario/lu4eou succeed with early .
And again, the packet decoded more easy with Soundmodem @ 44100 RXSR .
Nothing decoded with slower RXSR!.
Obvious!! 44100 gave more decoded rate (at least on CUBEBUG-1 packet!).
On other-hand  I've t  noticed any super performance  with Aenesa sat . !

CUBEBUG-1 & SoundModem

Soundmodem with XRsampleRate 44100 seem works will with CUBEBUG-1
Thanks Mario/ LU4EOU for info and email.
--------------------------------------------
From: Mario
Cc: 'Mike Rupprecht' ; 'PE0SAT | Amateur Radio' ; 'Tetsu(JA0CAW)' ; 'Mitsuo Noguchi' ; 'Colin Hurst' ; 'Nader Omer'
Sent: Wednesday, May 15, 2013 5:54 PM
Subject: decoding
Hi all
Using Soundmodem with sample 44100 (from mod INI file, readed at Nader ST2NH blog and mod by Mineo Wakita JE9PEL), 2 packet decoded from Cubebug.
1:Fm CUBEB1 To CQ [10:52:41R]
ÿÿóÿÿðððððÿÿÿÿÿÿÿÿÿ
1:Fm CUBEB1 To CQ [10:52:55R]
Ÿÿóÿÿðððððÿÿÿÿÿÿÿÿÿ
Regards :)
Mario, LU4EOU
-------------------------------------------
See  Soundmodem.ini !!previous post

Soundmodem.ini !!

Mineo Wakita /JE9PEL,  mentioned a new experiment at his Blog with SoundModem software.

Changing the RX SampleRate at the (soundmodem.ini) file from from 11025 / 22050 / 44100  increase the SoundModem decoding rate(sensitivity .)!!!
The SoundModem program shows up a warning message ,if you try to setup to 44100 limit via
devices--> settings -->  setting sound-card window .
But its possible to change the RXSampleRate via the soundmodem.ini file ?!!!

I re did this experiment and yes there is something different!!
I've used the recorded CubeBUG-1 audio file too.
I will give a try with birds , ASAP.

Mineo wrote  .
( Translated from Japanese -
Generally, you can change the Soundmodem → Settings → Devices → RX Sample-rate value
Consider the but, for example, when a user tries to enter 22050, to destination (warning) is out Warning
You can not proceed. Directly to the editor SoundModem.ini advocated by JA0CAW Bureau
I did not notice until now that in the rewrite, to the RXsampleRate = 44100.
It is good idea. CalPoly (California Polytechnic State University)
But file CubeBUG-1_CalPoly_30042013_1900-2.wav it receives from CubeBug-1
Using, in the same way as JA0CAW station, I tried to reproduce the experimental catch-up in the local station.
As follows, the difference in decoding rate by SampleRate value is obvious. No matter signal
And if you can even receive any clearly weak, It is can be decoded as this.).

At other experiment post ,with Aenesa satellite decoding Mineo said;
(timestamp was decoding even after satellite LOS.
I wonder if was easy to decode so. RXsampleRate = 44100 will be that paid off.)

Mineo's Blog
JE9PEL HomePage

ESTCube-1, Perfect signaal.

Ma armastan seda väikest lindu.
Nagu ma ütlesin oma esimeses aruandes (pärast 1. pass) see satelliit on väga selge ja kena signaali.
Lühike klipp signaali spekter, näitab aega ja jõudu on täiuslik kopeerida ja dekodeerida.

ESTCube-1 Beacon heard

07:50  UTC
ESTCube-1 Beacon heard over Africa ,strong and clear signal.
Congratulation to the team members.

ES5E/S T WMTC5ET ZFHB6E ATTT DNTTTT TTFSFS 5A5NTT TTTZ TZTT KN

Prelim Keps :
ESTCube-1
1 99999U 99999    13127.17171296  .00000000  00000-0  10000-3 0 00005
2 99999 098.1390 205.7730 0134000 220.5400 211.2631 14.71982716000009

ESTCube-1 HP

Signal at 437.200Mhz

 20.38  20:51 UTC 2nd  May

For the 2nd time a signal notice during TurkSat3 pass at 437.200Mhz

The signal was disappeared  with satellite LOS!!!.

It looks like some kind of digital Mod!!!.
I'll monitoring this frequency .  

AENEAS Packet Telemetry

08.20 UTC
Location : Bangalore, India
Thanks Divya Shankar  (YL).

1:Fm KE6YFA-1 To CQ Via TELEM [14:04:54R]
4341455255531D0040020003150B010C171407050000001000F07500007F1C0049C062D9414886
1:Fm KE6YFA-1 To CQ Via TELEM [14:05:14R]
4341455255531D0040020003150B010C172807050000001000F07500007F1C0049C062D9412387
1:Fm KE6YFA-1 To CQ Via TELEM [14:05:54R]
4341455255531D0040020003150B010C181407050000001000F07500007F1C0049C062D9413DB1
1:Fm KE6YFA-1 To CQ Via TELEM [14:06:13R]
4341455255531D0040020003150B010C182807050000001000F07500007F1C0049C062D94156B0
1:Fm KE6YFA-1 To CQ Via TELEM [14:06:33R]
4341455255531D0040020003150B010C190007050000001000F07500007F1C0049C062D941877E
1:Fm KE6YFA-1 To CQ Via TELEM [14:06:53R]
4341455255531D0040020003150B010C191407050000001000F07500007F1C0049C062D9415186
1:Fm KE6YFA-1 To CQ Via TELEM [14:07:13R]
4341455255531D0040020003150B010C192807050000001000F07500007F1C0049C062D9413A87
1:Fm KE6YFA-1 To CQ Via TELEM [14:07:33R]
4341455255531D0040020003150B010C1A0007050000001000F07500007F1C0049C062D9413327
1:Fm KE6YFA-1 To CQ Via TELEM [14:07:53R]
4341455255531D0040020003150B010C1A1407050000001000F07500007F1C0049C062D941E5DF
1:Fm KE6YFA-1 To CQ Via TELEM [14:08:13R]
4341455255531D0040020003150B010C1A2807050000001000F07500007F1C0049C062D9418EDE 

22:10 UTC
4341455255531D0040020003160B02013A2807050000001000F07500007F1C0049401BF6414A72
4341455255531D0040020003160B02013B0007050000001000F07500007F1C0049401BF6419BBC
4341455255531D0040020003160B02013B1407050000001000F07500007F1C0049401BF6414D44
4341455255531D0040020003160B02013B2807050000001000F07500007F1C0049401BF6412645
4341455255531D0040020003160B0202000007050000001000F07500007F1C0049401BF641BD16
4341455255531D0040020003160B0202001407050000001000F07500007F1C0049401BF6416BEE
4341455255531D0040020003160B0202002807050000001000F07500007F1C0049401BF64100EF
4341455255531D0040020003160B0202010007050000001000F07500007F1C0049401BF641D121
4341455255531D0040020003160B0202011407050000001000F07500007F1C0049401BF64107D9
4341455255531D0040020003160B0202012807050000001000F07500007F1C0049401BF6416CD8
4341455255531D0040020003160B0202020007050000001000F07500007F1C0049401BF6416578
4341455255531D0040020003160B0202030007050000001000F07500007F1C0049401BF641094F
4341455255531D0040020003160B0202032807050000001000F07500007F1C0049401BF641B4B6

TurkSat3U status

Beacon Status:
Nothing copied since last Friday 26 April.!!

A weak continuous signal (carrier?) with slight Doppler was noticed during the last pass 19:28 19:40 UTC This signal came around the TCA and disappeared around the LOS. Not exactly at the down-link frequency but around  +/- 437.200 MHz.
Yes many sky junks around ! , which can be the cause of such a QRM, It may be interesting to monitor this frequency as long as the signal disappeared with the TurkSat3U's LOS.

Another event occurred last Friday, April 26, 2013, 10:39 AM, while I was monitoring Turksat3U I've noticed two CW signals overlap each other!!, The 1st signal was a clear TurkSat3U Beacon; the other signal was an ambiguous CW signal !.You can see the audio analysis at the previous post ..
Mike(DK3WN)  identified the source of the other signal as a failed CW beacon of RS-40.
(Thanks Mike for help)

Transponder status:
Loop test performed several time ,but nothing heard or seen on the waterfall.

At my previous post Mr.Ahmet Sofyalı from  Space Systems Design and Testing Laboratuary of ITU. Had posted a comment stated:
Since Friday (April 26th), TURKSAT 3USAT could not be heard again.
Thanks Mr.Sofyalı for visiting and comment .
Unfortunately this record from Friday, April 26, 2013, 10:39:51 AM
Still we are QRV with great hope.

Most updated info for Turksat 3U available at Facebook !?
Tamsat Amsat-Tr   and   Turksat3usat Fan Club

TURKSAT3U CW BEACON

TURKSAT3U CW BEACON

NASA Phonesat's Puzzle Pictures

Smartphone every where even at sky :)

Here is the composed Puzzle picture from Bell and Graham ( NASA smartphone Nano-satellites) Phonesats. Published at Phone-sat website .

Graham Picture

 

Bell Picture

See previous post  Phonesat Images received

Turksat 3Usat cw beacon heard over Africa

A weak turksat beacon heard - low pass elevation 
Xponder not heard - !!!
Cubebug-1 beacon not heard !!!

Congratulation to all team for successful launch and orbiting  

At the 1st pass I  detect the beacon too at the  I&Q audio  record file ! 
RTL-SDR confused me with it low resolution  . again congratulation

Images received from Phonesat

Here are example of the images I received from Phonesat ,every Image is small part of one big picture
 which is been compose by phonesat team from the world wide collected data ,Like jigsaw puzzle photo.

The received packet frames decoded at Phonesat website.
Phonesat.org
log in or sign in .
Go to packet page
Copy and past the packet frame at the decoder window.
Click decode button .
A link will shown down the decoder with decoded image link.
Click save the image.
the Image with file extension .webp.
Use Opera or Google chrome to open it.

 The ratio of the received images size to full screen size.!!

Below is the recent email from PhoneSat team gave more info, plus the new 2TL.
We have finally received official TLEs of the three satellites. They have been updated to the website. We also add them in this email:
GRAHAM
1 39142U 13016A 13114.89139670 .02066248 11824-4 11888-2 0 125
2 39142 051.6312 294.1214 0011318 353.4416 006.6606 16.18063182 484
BELL
1 39143U 13016B 13114.89029360 .02779577 11872-4 14142-2 0 147
2 39143 051.6283 294.1154 0011084 343.5055 016.9415 16.19669199 498
ALEXANDE
1 39146U 13016E 13114.89004989 .02887841 11883-4 14290-2 0 38
2 39146 051.6237 294.1128 0010785 344.8223 015.2784 16.20034403 395

I seems that Alexander and Bell are flying very close to each other and Graham is a bit more distant. As for now, the TLEs that we had seem to point more towards Graham, but we would suggest targeting Alexander and Bell.
We are working on releasing the reconstructed pictures that we have so far, we still need your help to finalize the picture.
Again, thank you very much for your great collaboration, we will let you know once the pictures are on the site.
Thanks,
PhoneSat team

 Phonesat.org

More info about  NASA Phonesat  see NASA NEWS

-----------------------------------------------------------------------------------------------------------------
 Phonesats tlm & Image packet frames rx 25/4/2013

 14:13  14:21  UTC

1:Fm KJ6KRW To CQ Via TELEM [17:15:17R]
[1262348587967;32;1808;2;3;778;1018;302;64;1012;0;53;79;110;0;349;1014;29;116;1015]
2:Fm KJ6KRW-2 To CQ Via TELEM [17:15:43R]
ÿ5qk&N1/^\57X>%7!*;TU:f^CP+Dq/Z!3u\,SH12S!"T&n/J8Xa_(=(=[*CpeQkX*FT-jG-8#;5)3^&<2y5kdo b="" i="G3(%8)Q\X/8`l-ia5ÿ<br">
1:Fm KJ6KRW-2 To CQ Via TELEM [17:16:14R]
ÿ5qk&M1K$e67Yh$E!*;TU:f^CP+FF.h!:g3lSH12S!"T&nfj(CJU`uM""9LgtKX-,'R6VD?$?ECh>W5_4!!*#4$Tc:T)ITq
1:Fm KJ6KRW To CQ Via TELEM [17:19:02R]
[1262348812968;32;1817;3;3;582;599;606;581;586;601;602;571;563;605;574]
1:Fm KJ6KRW-1 To CQ Via TCPIP [17:22:01R]
ÿ681/N3)W=;7XtI=!*;TU:f^CP+ERS`!-//ASH12S!"T&^+Vou)JcGiT["(o>68/BKC0/sSV+)CShuNcVg+N4o'VQ2X*;KIKZ`!Q2fJ/Aga>W'2*pR1>jupY;,*p'0$ZC/5rP!!ÿ
1:Fm KJ6KRW To CQ Via TELEM [17:26:25R]
[1262348587967;32;1808;2;3;778;1018;302;64;1012;0;53;79;110;0;349;1014;29;116;1015]
2:Fm KJ6KRW-2 To CQ Via TELEM [17:26:58R]
ÿ5qk&N1/^\57X>%7!*;TU:f^CP+Dq/Z!3u\,SH12S!"T&n/J8Xa_(=(=[*CpeQkX*FT-jG-8#;5)3^&<2y5kdo b="" i="G3(%8)Q\X/8`l-ia5ÿ<br">
1:Fm KJ6KRW To CQ Via TELEM [17:28:21R]
[1262348662967;32;1811;1;3;30.8;52;-3.8;45.7;-70.3;34;-0.7;-0.1;-0.6]
1:Fm KJ6KRW-2 To CQ Via TELEM [17:29:40R]
ÿ5qk#Q2H!+97Z7.!4n3ur1EZZ&=r/GJ,oTGge61b7Gb%M;u[8'XWJq&QTY0+9j:CW9i!tmpfKn=V,D$md=Q`nrP.?K6D=ors8H1$q0F.>=&Yaa
1:Fm KJ6KRW To CQ Via TELEM [17:32:37R]
[1262348812968;32;1817;3;3;582;599;606;581;586;601;602;571;563;605;574]

Here are example of the  images I received from Phonesat

----------------------------------------------------------------

Phonesat Packet TLM

14:40  14:48 UTC

1:Fm KJ6KRW To CQ Via TELEM [17:47:27R]
[21;1178;4;3;74.4;-74.1;-4.3;0;0;0;0;0;0;0;0;0;-30.7;-81.8;-58.8]
2:Fm KJ6KRW To CQ Via TELEM [17:47:27R]
[21;1178;4;3;74.4;-74.1;-4.3;0;0;0;0;0;0;0;0;0;-30.7;-81.8;-58.8]
1:Fm KJ6KRW To CQ Via TELEM [17:48:32R]
[1262348388308;21;1180;2;3;776;1015;303;56;1015;0;88;85;79;134;1;1014;15;66;0]
2:Fm KJ6KRW To CQ Via TELEM [17:48:32R]
[1262348388308;21;1180;2;3;776;1015;303;56;1015;0;88;85;79;134;1;1014;15;66;0]
1:Fm KJ6KRW To CQ Via TELEM [17:49:07R]
[1262348388308;21;1180;2;3;776;1015;303;56;1015;0;88;85;79;134;1;1014;15;66;0]
2:Fm KJ6KRW To CQ Via TELEM [17:49:07R]
[1262348388308;21;1180;2;3;776;1015;303;56;1015;0;88;85;79;134;1;1014;15;66;0]
2:Fm KJ6KRW-2 To CQ Via TELEM [17:49:31R]
ÿ5qk#N1f?n77Y1U?!*;TU:f^CP+Ed_b!7CrLSH12S!"T&o%1:Fm KJ6KRW-1 To CQ Via TCPIP [17:50:10R]
ÿ681)J0iCS47Yh$E!*;TU:f^CP+FF.h!7CrLSH12S!"T&nnRS[q,bh"M"9M+)"L

617J-!<2rizz06k as="" e:a="" ti="">\o-SXC(KYq7[%"C\gXS5PX(t$M%JLQhpIV(O"Z4._#=lWAk*tmg4UOdQ@Nt%WDCJ!!ÿ
2:Fm KJ6KRW-1 To CQ Via TCPIP [17:50:10R]
ÿ681)J0iCS47Yh$E!*;TU:f^CP+FF.h!7CrLSH12S!"T&nnRS[q,bh"M"9M+)"L

617J-!<2rizz06k as="" e:a="" ti="">\o-SXC(KYq7[%"C\gXS5PX(t$M%JLQhpIV(O"Z4._#=lWAk*tmg4UOdQ@Nt%WDCJ!!ÿ
1:Fm KJ6KRW-1 To CQ Via TCPIP [17:58:14R]
ÿ681/Q1K$e67Z%0G!*;TU:f^CP+FX:j!)`n!SH12S!"T&n73%4QK)gEe!/Qr&!B:((i9kriAf8t2!<3 amp="" bq="" d94mh=";[aYPT=G)u\ÿ<br" hson5p2ba="" jz="" pvq4qs="" qdkcpkgfw="" qo="" ro1r="" rs="" t2="" uhnsm="" ulj="">2:Fm KJ6KRW-1 To CQ Via TCPIP [17:58:14R]
ÿ681/Q1K$e67Z%0G!*;TU:f^CP+FX:j!)`n!SH12S!"T&n73%4QK)gEe!/Qr&!B:((i9kriAf8t2!<3 amp="" bq="" d94mh=";[aYPT=G)u\ÿ<br" hson5p2ba="" jz="" pvq4qs="" qdkcpkgfw="" qo="" ro1r="" rs="" t2="" uhnsm="" ulj="">

Phonesats TLM with puzzle pieces frames

14:46  14:54 UTC
A delay of 3 or 4 min noticed  ref to 1st Published  Keps !!

1:Fm KJ6KRW-2 To CQ Via TELEM [17:50:43R]
ÿ5qk#N2c<4:7yh amp="" bh="" br="" ch="" f="" g3lsh12s="" h="" hb="" j1u7="" ln="" nnredr="" s="">
(9_M5]WOA#&idXcMloDRcp#NEkK#bT4:1ClOuT=Gd(]a#OJ>61*!=h;`u$j<2 b="" br="" k="" m="" oms="" qi="">1:Fm KJ6KRW To CQ Via TELEM [17:52:53R]
charging815,5,6,0
2:Fm KJ6KRW To CQ Via TELEM [17:52:53R]
charging815,5,6,0
1:Fm KJ6KRW-2 To CQ Via TELEM [17:53:12R]
ÿ5qjuK2,["87Z7
o9N[Gb,8d['CG^%KJkX$jXPZIQO_43Y2:Fm KJ6KRW-2 To CQ Via TELEM [17:53:12R]
ÿ5qjuK2,["87Z7
o9N[Gb,8d['CG^%KJkX$jXPZIQO_43Y1:Fm KJ6KRW-1 To CQ Via TCPIP [17:53:56R]
ÿ63$uc!<<*"%0-A0h#IE_5l^lch%J@3Qp>0g!^i0?k2:Fm KJ6KRW-1 To CQ Via TCPIP [17:53:56R]
ÿ63$uc!<<*"%0-A0h#IE_5l^lch%J@3Qp>0g!^i0?k1:Fm KJ6KRW To CQ Via TELEM [17:54:39R]
charging815,5,6,0
2:Fm KJ6KRW To CQ Via TELEM [17:54:39R]
charging815,5,6,0
1:Fm KJ6KRW-2 To CQ Via TELEM [17:54:42R]
ÿ5qk&K1K$e67YCaA!*;TU:f^CP+F!kd!)`n!SH12S!"T&nYt1HXUEU*J!>kul=MQQ)!tiSU2r*h?!;1,BS4P$j\p],_j43p]&$pS

[i&isB1TGfc!IQCn8\7kCfdIf#uI7iD#JjCB*)4=1:Fm KJ6KRW-2 To CQ Via TELEM [17:55:42R]
ÿ5qjuM0iCS47YUmC!*;TU:f^CP+F4"f!&=ZWSH12S!"T&nFYK(MU':VuL]PmT+;:VKNWC7&f^NU];Q5jBoI:[Xr/@cg;AT)4jc5/n)

2.UaO\-.9+Jfi_N4</%^+i4Jk"T5;?XVqX%nT]jM2:Fm KJ6KRW-2 To CQ Via TELEM [17:55:42R]
ÿ5qjuM0iCS47YUmC!*;TU:f^CP+F4"f!&=ZWSH12S!"T&nFYK(MU':VuL]PmT+;:VKNWC7&f^NU];Q5jBoI:[Xr/@cg;AT)4jc5/n)

2.UaO\-.9+Jfi_N4</%^+i4Jk"T5;?XVqX%nT]jM

All 3 Phonesat received

15:07 UTC
Orbit # 13
The signals were so strong and very readable from the 3 phonesat
Received via FunCube dongle and Soundmodem frequency 437.425MHZ .

Graham and Bell weppy picture .

A new and very interesting idea for the Cube-sat ..
Like jigsaw puzzle photo, Graham and /or Bell  will be sending a weppy picture in pieces  .
A complete photo will be composed from those collected  packets frames.


Graham and Bell packets:
Three different types of packets ASCII85 encoded.
 Normal online ASCII85 decoders will not work. Use PhoneSat’s Decoder to decode your packets.!!
Health Data Packet
Safe Mode Packets
Picture Packets

Alexander packets:
Packets will not be encoded; they will be plain ASCII characters.
There are 5 types of packet:

Sensors from the phone
Current and voltage values
Temperatures
BDot packet
Charging packet

More interesting info at   PhoneSat Packet description page

phonesat 
Orbital Sciences Corporation has confirmed the next probable attempt to test launch its Antares rocket from NASA's Wallops Flight Facility on Wallops Island, Va., will be no earlier than Friday, April 19, at 5 p.m. EDT.

Nanosatellite linear transponder (4) Delfi-n3Xt

Delfi-n3Xt (Delfi Triple CubeSat NeXt) is another Nanosatellite from Delft University of Technology (TU Delft) with liner transponder. Launch is scheduled for Jul 2013.

Compared to Delfi-C3, Delfi-n3Xt will be equipped with batteries, an active ADCS, and a high-speed S-band transmitter.

The Communication Subsystem will carry no less than three radios:

The PTRX (Primary Transceiver)
provides an UHF (435 MHz) up-link at 600 or 1200 bit/s. The down-link is in VHF (145 MHz) at 1.2 or 2.4 Kbit/s. The PTRX is of Delfi-C3 heritage. The PTRX is further complimented with a linear transponder (UHF up, VHF down) . And might also be equipped with an experimental OLFAR (Orbiting Low Frequency ARray) transponder for very low frequencies.

The payload ITRX (ISIS Transceiver)
The frequency bands used by the ITRX are VHF for down-link and UHF for up-link. The data rates are 1200 bit/s for up-link and a maximum of 9600 bit/s for the down-link, which can be variable. The maximum transmitter power will be at least 400 mW,
Besides flying as a payload, the up-link receiver of the ITRX can be used as a backup command receiver for commanding the satellite. Furthermore, the transceiver will be used for ranging purposes, whereby the transceiver acts as a transponder.

The high-speed STX (S-band Transmitter).
The STX (S-band Transmitter) of 2.4 GHz provides variable down-link data rates between 9.6 and 250 Kbit/s.

In addition, there is the antenna subsystem consisting of at least 9 antennas. Four UHF up-link antennas are positioned alongside the solar panels, and four VHF down-link antennas are mounted canted turnstile at the far end of the satellite. The high-speed S-band down-link will use one or multiple patch antennas. 

Source : eoportal.org

Upcoming Satellites Frequency Chart

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Estonia’s ESTCube-1 integrated into Vega

The multi-satellite payload “stack” for Vega’s upcoming flight from French Guiana is now taking shape as the Arianespace-managed integration process advances at the Spaceport. This activity began in the Spaceport’sS5 clean room facility with installation of Estonia’s ESTCube-1 student nanosatellite on a flat mounting surface called the P2 Plate, which serves as the lower interface in the Vega’s payload stack. The small cube-shaped satellite and its dispenser were integrated using a bracket that was mounted to the P2 Plate.

The next step was the placement of Vietnam’s VNREDSat-1 with its interface adapter on the P2 Plate, joining ESTCube-1.

Both satellites are located in the payload stack’s lower position, and will ride inside a larger dispenser system called VESPA. Completing the payload arrangement will be installation of the mission’s third satellite—Proba-V—which is to ride atop the VESPA dispenser. Proba-V will have a mass at liftoff of 160kg. and is to monitor global vegetation growth. Produced by prime contractor QinetiQ Space Belgium for the European Space Agency, the satellite is equipped with a newer version of the Vegetation imaging instrument that previously operated on the Spot series of Earth observation satellites—which also were orbited by Arianespace.

The 1.3kg. ESTCube-1 cubesat was designed to test electric solar wind sail technologies, as well as help establish an Estonian infrastructure for future space projects. It was built by a collaboration of students from Tartu University, Estonian Aviation Academy, Tallinn University of Technology and University of Life Sciences —and was developed in conjunction with the Finnish Meteorological Institute and the German Space Center (DLR).

Source http://www.satnews.com/

Nanosatellite linear transponder (3) TurkSat

TurkSat is a 3U CubeSat, the first communication nanosatellite mission of ITU (Istanbul Technical University),

The VHF/UHF transponder is the main payload to provide two -way radio communications. The VHF uplink has a frequency of 145.990 MHz, the UHF downlink band has a frequency of 435.200 – 435.250 MHz. The transponder consists of amplifiers, filters, mixers and AGC (Automatic Gain Control) stages. The VHF uplink signal is up-converted to the UHF downlink signal linearly. The system has again of 150 dB with 60 dB of the total gain being adjustable. The communication system with transponder has a link margin of 10 dB.

Uplink center frequency	145.965 MHz
Downlink center frequency	435.225 MHz
Bandwidth	±25 kHz
Output power	30 dBm (1W)
Receive sensitivity, gain	-120 dBm, 150 dB
Total power consumption	< 3 W
Automatic gain control	Yes
Antennas	Monopole (Cu-Be)
PCB (Printed Circuit Board) size	8.8 cm x 8.8 cm x 0.5 cm
Transponder mass	< 250 g
Supply voltage	2.8 V, 3.3 V, 5 V DC
Microcontroller	MSP430F5438

 Specification of the transponder system

 Illustration of the transponder desktop model (image credit: ITU)

Antenna system: The communication system consists of three subsystems with their backups: the modem, transponder, and the beacon.

System	UHF Antenna (435 MHz)	VHF Antenna (145 MHz)	No of antennas
Transponder	2	2	4
Modem	2	2	4
Beacon	2	-	2
Total	6	4	10

Antenna system of the satellite communication subsystem

Source eoPortal