Re: Image from ATX-12017年12月14日 23時13分

    
 

Re: Image from ATX-1
From: Roland Zurmely
Date: Wed, 13 Dec 2017 15:56:55 +0000 (UTC)

Missing block is from signal fading...
New images received 15:02 UTC 13-12-2017: (2 times magnified)

Narrow-angle night view: Kuala Selangor, Malaysia :
Global view: Parque do Xingu, State of Mato Grosso, Brazil :
Manual decoding !!! hi hi... with data direct from HSsoundmodem.
Not using .KSS files.
73 de Roland.

Re: Image from ATX-1
From: Yesie Brama
Date: Thu, 14 Dec 2017 03:42:34 +0000 (UTC)

Dear Roland, 
Beautiful, thanks a lot ! :)Sorry for the tedious work of the manual 
reconstruction, but well done :)Is it possible to send your recording/s?

Thanks again & 73,Yesie

Re: Image from ATX-1
From: Roland Zurmely
Sent: Wednesday, 13 December 2017, 23:57

Missing block is from signal fading...
New images received 15:02 UTC 13-12-2017: (2 times magnified)

Narrow-angle night view: Kuala Selangor, Malaysia :
Global view: Parque do Xingu, State of Mato Grosso, Brazil :

Manual decoding !!! hi hi... with data direct from HSsoundmodem.
Not using .KSS files.
73 de Roland.

On Wednesday, December 13, 2017, 1:34:16 PM GMT-2,
Yesie Brama wrote:

Thanks Roland, 
The missing block is due to bad reception or just due to
reconstruction process?It's Ethiopia region :)

73,Yesie

Image from ATX-1
From: Roland Zurmely
Sent: Wednesday, 13 December 2017, 21:37

Missing 1 block...
73 de Roland.

Re: Image from ATX-1
From: Roland Zurmely
Date: Thu, 14 Dec 2017 10:55:07 +0000 (UTC)

Dear Yesie, Mike and Mineo,
I'm using data copied directly from the monitor screen of HSsm0.15b,
and they allow you to decode without error icons and thumbnails.
The .kss files generated by AGWonlineKiss actually change the data
received by the HSsm, as shown in the following figures.

This with the option "Decode KISS frames" checked or not !
The correct data are those of HSsm, which already eliminates the
initial C0 00 and the final C0, as can be seen in the attached files,
received on 14 dec 2017.

This files contain 2 complete transmissions, with icon,
thumbnail and text:

Global view: Sunda strait and Java island, Indonesia:
Wide-angle view: Singapore, West Malaysia, and Sumatera & Riau islands, Indonesia.:

73 de Roland.

On Thursday, December 14, 2017, 1:42:40 AM GMT-2,
Yesie Brama

Dear Roland, 
Beautiful, thanks a lot ! :)Sorry for the tedious work of the manual
reconstruction, but well done :)Is it possible to send your recording/s?

Thanks again & 73,Yesie

Re: MakerSat-02017年12月13日 20時04分

From: Stephen Parke
To: Mineo Wakita
Date: Tue, 12 Dec 2017 22:36:08 -0700

Mineo
Thank you! MakerSat-0 transmits on a proprietary Globalstar satellite
network frequency, not in the amatuer band.
Best wishes
Steve Parke

On Nov 20, 2017 4:08 AM, Mineo Wakita wrote:

> Congratulations MakerSat-0 Launch!
>
> What is the downlink frequency and mode?
> Please teach us them.
>
> Thank you.
> http://www.ne.jp/asahi/hamradio/je9pel/fox1bcp7.htm
>
> JE9PEL, Mineo Wakita

Athenoxat-1 icon2017年12月13日 19時59分

From: Roland Zurmely
To: Mineo Wakita
Date: Tue, 12 Dec 2017 21:56:11 +0000 (UTC)

Hi Mineo,
Icon received from Athenoxat-1:

73 de Roland PY4ZBZ

Athenoxat-1 new beacon2017年12月12日 20時16分

Subject: Athenoxat-1 new beacon
From: Yesie Brama
Date: Mon, 11 Dec 2017 11:06:26 +0000 (UTC)

Dear all, 
Greetings from Athenoxat-1 team :)

It's been a while and we're glad to inform that our satellite Athenoxat-1
(ATX) is doing well until today, entering into her 2 years life in space.
To celebrate this event, we have modified the data beacon hopefully for
the pleasure of HAM activities around the world.

As we understand, HAM community has been able to decode ATX data beacon
using HS Soundmodem (version 0.15b?). So just to explain the new structure
of the data beacon: Apart from the COM header/sync marker etc, the real
data size for each packet expected will be 216 bytes.

The first byte = type of data of either {2, 4, 5} which means {in-house
icon image, thumbnail images produced by ATX, the text-note to explain
the image contain in the thumbnail}

For the type of data 2 and 5 (single chunk concept):
The next 2 bytes = the variable file size of the icon image / text-note,
for example 192. Thus the next 192 bytes will be thecontent of the image/
text-note itself.

The next remaining (216 - 1 - 2 - 192) = 21 bytes can be ignored.
he icon image is in .bmp format & text note is ASCII characters.
For the type of data 4 (multiple chunks concept):

The next 1 byte = the variable size of last remaining bytesNext 2 bytes=
the variable file size of the thumbnail imageNext 2 bytes = chunk marker
For example, the thumbnail image is 3748 bytes. The beacon transmission
will be chunk by chunk with each chunk has size 210 bytes.

Therefore roundup (3748 / 210) = 18 with the modulus or last remaining
bytes = 178 bytes.So in this example, each packet will have the first
4 bytes the same value, and the next 2 bytes is chunk marker, and next 210
bytes will be the content of thumbnail image and should expect 18 packets
transmitted. First packet will have chunk marker = 18 and next packet
decrements to 17 and so on. The last packet should have chunk marker = 1.

Specific to the packet with chunk marker = 1, the remaining
(216 - 1 - 1 - 2 - 2 - 178) = 33 bytes can be ignored.
The thumbnail is in .jpg format. Should there be any difficulty in
reconstructing the data, you can send the recorded packets (not just
the screenshot) you've received to us, and we'll be glad to help.

In addition, we would really like to send the overdue QSL cards to you
who has been curious and received our ATX beacon last year.
We are thinking to send this QSL card via ATX transmission too. What is
needed is only for us to make the appointment :)

Please let us know your confident good quality AOS of ATX and for how
much duration. Then we'll upload to the satellite Flight Planner so that
when ATX is passing your AOS time, she'll start transmitting the chunks
of the QSL card.

We've prepared the QSL cards and they are about 30kB size, thus the
required transmission duration should be less than 5 minutes.
This is because the chunks will be sent in the interval of 2sec, as not
tostress ATX radio. In case there's interference / bad connection during
the transmission, we can resend you only the specific chunk markers that
you miss at the next appointment time.

We hope this activity will spark the interest of HAM people around the
world who can receive ATX beacon. Since this is a kind of new experiment/
features of ATX, let us please test it with your first before we publish
this information to the public. When this new features are confirmed good,
we'll update our website too with this detailed information. Looking
forward to your feedback then. Thanks much in advance for your time.
Kind Regards, Athenoxat-1 Team, Microspace Rapid 9V1FC / 9V1SQ

FIREBIRD-3 realtime 19k22017年12月11日 20時27分

【FalconSAT-3 衛星を追う】 by JE1CVL2017年12月10日 20時07分

"HS Soundmodem + VSP + WiSP" によるアップリンクの考察を JE1CVL局が行って
います。一般にソフトTNC によるアップリンクは難しいとされていて、その理由
は、サウンドカードのレベル出力にあるということです。以下に再編集しました。
http://www.asahi-net.or.jp/~ei7m-wkt/numbr970.htm

DTUsat-2 AOS 2.4GHz2017年12月10日 10時47分

現状では、AOS直後に 1回聞こえるのみです。これを逃すと
2度目以降は聞こえません。超難儀な衛星となっています。

FalconSAT-3 digipeater2017年12月09日 23時28分

FalconSAT-3 digipeater 構築中。
AGWPE + UISS + TNC241 + TMB965

SpaceCube ?2017年12月08日 20時21分

LOS してからも聞こえていた。
この信号は SpaceCube のものでない?

ISS not heard2017年12月07日 22時03分

夜のパスでは SSTV 聞こえてきませんでした。
タイミングが必要なようです。