[amsat-bb] XW-1 Beacon

[Sangat Singh]

Heard beacon over Malaysia 04.10 UTC Pass. Strong signal

Sangat Singh, 9M2SS

-- 
Sangat Singh
53, Jln. Perdana
National Planetarium
50480 Kuala Lumpur (MALAYSIA)
Mobile: +6012 283 8873
Office: +603 2278 7388
FAX: +603 2273 8873
Skype ID: sukhija
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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Mani VU2WMY]

Hi,

YAOGAN 8 traveling faster could be due to possible initial orbit  
corrections and maneuvering that includes minor correction of  
injection velocity (delta V). The drag do influence even at  
geo-transfer and geo-synchronous orbits.

73 de
Mani, VU2WMY
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre
Airport Road, Bangalore-560 017.
Phone:(O)91-80-2508 2054/2192/2537
Mobile:  91-80-98803 41456
E-mail ID: w...@isac.gov.in
vu2wmy_m...@yahoo.com
isroh...@yahoo.com

Quoting Alexandru Csete :

> The influence of the drag force also depends on the mass since F=m*a,
> so the same drag force will cause less deceleration on a heavier
> satellite. You have to put this together with F=pressure*surface_area
> to take both the size and the mass of the satellite into account.
>
> By the way, is there any significant atmospheric drag at 1200 km
> altitude?
>
> 73
> Alex OZ9AEC
>
>
> On Wed, 16 Dec 2009 18:56:20 +
> Nigel Gunn G8IFF/W8IFF  wrote:
>
>> OK, I'll revise my earlier question and suggest a reply.
>>
>> The physically larger satellite will have more atmospheric drag which
>> will spiral it into a lower orbit. The lower orbit, the higher the
>> velocity and thereforeit crosses your horizon earlier.
>>
>> Nigel Gunn G8IFF/W8IFF wrote:
>>
>> >
>> > Is this correct that the higher mass satellite travels faster than
>> > the lower mass of XW?
>> >
>>
>>
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[amsat-bb] Satellite Sounds Record from 1958

[RFI-EMI-GUY]

http://www.folkways.si.edu/albumdetails.aspx?itemid=1145

http://media.smithsonianfolkways.org/liner_notes/folkways/FW06200.pdf

-- 
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Use only Genuine Interocitor Parts" Tom Servo  ;-P


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[amsat-bb] POLLUX QSL cards and Mission Patches

[Randy]

Anyone know the status of this?
I tried to email Ivan and got an email delivery error.

Randy - N2CUA


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[amsat-bb] XW-1 beacon

[George Henry]

Just listened to the 01:30 pass of XW-1  even with just a 1/4 wave 
groundplane, that beacon is impressively strong!!!

Can't wait to play on the transponders!!



George, KA3HSW 

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[amsat-bb] XW-1 #24 Heard over Portugal

[Fabiano Moser]

Fine copy of the satellite CW beacon.

 

Could hear since AOS till LOS 0º.

 

Happy!

 

73 Fabiano Moser CT7ABD – PY5RX 

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[amsat-bb] Re: AO-7

[Nigel Gunn G8IFF/W8IFF]

It's allowed to be off frequency. It's just had it's 35th birthday.

Change your uplink or downlink frequency slightly to compensate.

Where have you "the following" listed?

Jack Barbera wrote:
> Still seem to be off frequency ,tried using RIT to tune but no luck.
> Have the following listed:
> AO-7,145950,432150,USB,LSB,rev,0,0,modeB 
> any help would be appreciated.
> Thanks for any helpJack WA1ZDV 
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> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 9.0.716 / Virus Database: 270.14.110/2568 - Release Date: 12/16/09 
> 08:02:00
> 

-- 
Nigel A. Gunn,  1865 El Camino Drive, Xenia, OH 45385-1115, USA.  tel +1 937 
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF),  e-mail ni...@ngunn.net   www  
http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pigs QRP Club 
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691,  AMSAT-UK 0182, MKARS,  ALC, 
GCARES, XWARN.

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[amsat-bb] Re: AO-7

[Alan P. Biddle]

Jack,

Those numbers look about right.  Certainly close enough to find yourself.  I
would suggest using the buttons in the CAT menu to net yourself in.  Some
rigs don't work well with the RIT for this. 

Which rig are you using?

Alan
WA4SCA


-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On
Behalf Of Jack Barbera
Sent: 16 December, 2009 14:32
To: Amsat Reflector
Subject: [amsat-bb] AO-7


Still seem to be off frequency ,tried using RIT to tune but no luck.
Have the following listed:
AO-7,145950,432150,USB,LSB,rev,0,0,modeB 
any help would be appreciated.
Thanks for any helpJack WA1ZDV 
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[amsat-bb] XW-1 (20:00 UTC - JO21ho) Complete pass recording

[PE0SAT]

Hi,

During the pass of 20:00 UTC 15-12-2009 I made a complete recording.

Here is the link to listen or download the file. It's about 20min
but only 2Mb in size.

http://www.ham.vgnet.nl/downloads/XW-1_15-12-2009_2100-CEST.mp3

Here is the decoded telemetry:

BJ1SA XW XW AAA TTT AAB AUE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB AAT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB T6E ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TNE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TBT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TNE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB AUT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB ATT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TNE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TBT ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TBE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB T6T ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB A4T ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB TNE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB 4VE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB A4E ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW
BJ1SA XW XW AAA TTT AAB AUE ETT TTT TTT TTT TTT TTT TTT TTT TTT XW XW

73's PE0SAT



-- 
With regards PE0SAT
Internet web-page http://www.ham.vgnet.nl/


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[amsat-bb] AO-7

[Jack Barbera]

Still seem to be off frequency ,tried using RIT to tune but no luck.
Have the following listed:
AO-7,145950,432150,USB,LSB,rev,0,0,modeB 
any help would be appreciated.
Thanks for any helpJack WA1ZDV 
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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Andrew Glasbrenner]

Nigel Gunn G8IFF/W8IFF wrote:
> I don't know but something is causing the two satellites to drift apart.
> Knowing the rules helps to sort out the keplerian elements of the two.
>
>   
Keep in mind they were in all likelihood deployed at different 
velocities, so it a bit more complex than just drag, mass, and surface 
area even.

73, Drew KO4MA
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[amsat-bb] Re: Ao-51 mode V/S over Europe

[IK2CFR marco]

Hallo,
also at 18:40 utc very strong S band signal, even at very low elevation (60cm + 
keps converter)
Unfortunatly nobody from US (maine or vermont) and Canadian Atlanic coast.

73  Marco IK2CFR

- Original Message - 
From: "Francesco Grappi" 
To: 
Sent: Wednesday, December 16, 2009 6:26 PM
Subject: [amsat-bb] Ao-51 mode V/S over Europe


> Hi,
>
>
>
> Strong signal at 16.50 to 17.00 utc over europe this evening from Ao-51
> mode
> V/S.
>
> For entire pass the signal was very good over s-9 into 90 cm dish with
> Keps
> downconverter.
>
> Only twice during the entire orbit (3-4 seconds each), the signal dropped
> down
> below
>
> noise level.
>
>
>
> No tackers, only a few people who spoke French on the frequency of AO-51
> uplink.
>
>
>
> 73"
>
> Frank IW4DVZ
>
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Nessun virus nel messaggio in arrivo.
Controllato da AVG - www.avg.com
Versione: 9.0.716 / Database dei virus: 270.14.110/2568 -  Data di rilascio:
12/16/09 09:02:00
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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Nigel Gunn G8IFF/W8IFF]

I don't know but something is causing the two satellites to drift apart.
Knowing the rules helps to sort out the keplerian elements of the two.

Alexandru Csete wrote:
> The influence of the drag force also depends on the mass since F=m*a,
> so the same drag force will cause less deceleration on a heavier
> satellite. You have to put this together with F=pressure*surface_area
> to take both the size and the mass of the satellite into account.
> 
> By the way, is there any significant atmospheric drag at 1200 km
> altitude?
> 
> 73
> Alex OZ9AEC
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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Alexandru Csete]

The influence of the drag force also depends on the mass since F=m*a,
so the same drag force will cause less deceleration on a heavier
satellite. You have to put this together with F=pressure*surface_area
to take both the size and the mass of the satellite into account.

By the way, is there any significant atmospheric drag at 1200 km
altitude?

73
Alex OZ9AEC


On Wed, 16 Dec 2009 18:56:20 +
Nigel Gunn G8IFF/W8IFF  wrote:

> OK, I'll revise my earlier question and suggest a reply.
> 
> The physically larger satellite will have more atmospheric drag which
> will spiral it into a lower orbit. The lower orbit, the higher the
> velocity and thereforeit crosses your horizon earlier.
> 
> Nigel Gunn G8IFF/W8IFF wrote:
> 
> > 
> > Is this correct that the higher mass satellite travels faster than
> > the lower mass of XW?
> > 
> 
> 
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[amsat-bb] Re: Here is a very nice video about XW-1

[Steve Meuse]

Andrew Glasbrenner expunged (glasbren...@mindspring.com):

> http://english.cctv.com/program/chinatoday/20091216/100966.shtml

Makes me wondering if our German friends have had any discussions with the 
Chinese launch authority


-Steve

N1JFU -  http://n1jfu.blogspot.com - sme...@twitter

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[amsat-bb] Re: Mode J filter

[Steve Meuse]

Jabi expunged (ea2...@euskalnet.net):

> I want to buy one Mode J filter for work  V/U mode.

I've been meaning to try this filter, I know PAR makes good quality products:

http://www.parelectronics.com/images/amateur_sat/modej_specs.htm

Of course, you could also just use a diplexer...


-Steve

N1JFU -  http://n1jfu.blogspot.com - sme...@twitter

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[amsat-bb] XW-1 recording.

[Eric Knaps, ON4HF]

Ok,
Here is my recording of the XW-1 cw beacon.

www.on4hf.be/16dec2009-18u20.wav

73,
Eric -- ON4HF.

-- 
Eric Knaps
Waterstraat 30
B-3980 Tessenderlo
Belgium

Tel. +32472985876 (mobile)

http://www.on4hf.be

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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Nigel Gunn G8IFF/W8IFF]

OK, I'll revise my earlier question and suggest a reply.

The physically larger satellite will have more atmospheric drag which will 
spiral it into a lower 
orbit. The lower orbit, the higher the velocity and thereforeit crosses 
your horizon earlier.

Nigel Gunn G8IFF/W8IFF wrote:

> 
> Is this correct that the higher mass satellite travels faster than the lower 
> mass of XW?
> 


-- 
Nigel A. Gunn,  1865 El Camino Drive, Xenia, OH 45385-1115, USA.  tel +1 937 
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF),  e-mail ni...@ngunn.net   www  
http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pigs QRP Club 
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691,  AMSAT-UK 0182, MKARS,  ALC, 
GCARES, XWARN.

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[amsat-bb] XW-1 over Sao Paulo, Brazil

[PY2ZX]

Hello,

XW-1 beacon well heard even without devoted sat antenna on receiver
site. Audio file: http://archangelo.net/misc/sat/xw-1/view.htm

Flavio PY2ZX GG66nt




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[amsat-bb] Re: Here is a very nice video about XW-1

[Eric Knaps, ON4HF]

Hi Drew,

I found the same video on YouTube.

http://www.youtube.com/watch?v=WwyTZT6JkC4

Thanks to Amsat China for this new satellite!

Eric Knaps
Waterstraat 30
B-3980 Tessenderlo
Belgium

Tel. +32472985876 (mobile)

http://www.on4hf.be



Andrew Glasbrenner schreef:
> http://english.cctv.com/program/chinatoday/20091216/100966.shtml
>
> 73, Drew KO4MA
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>
>   
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[amsat-bb] Here is a very nice video about XW-1

[Andrew Glasbrenner]

http://english.cctv.com/program/chinatoday/20091216/100966.shtml

73, Drew KO4MA
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[amsat-bb] Ao-51 mode V/S over Europe

[Francesco Grappi]

Hi,

 

Strong signal at 16.50 to 17.00 utc over europe this evening from Ao-51 mode
V/S.

For entire pass the signal was very good over s-9 into 90 cm dish with Keps
downconverter.

Only twice during the entire orbit (3-4 seconds each), the signal dropped down
below

noise level.

 

No tackers, only a few people who spoke French on the frequency of AO-51 uplink.

 

73"

Frank IW4DVZ

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[amsat-bb] Re: XW-1 over Kuala Lumpur, Malaysia

[Sion Chow Q. C. (9W2QC)]

Dear All,

Just a resent in case this one did not go through.

Here is a recording of the 2nd pass, 17th December 2009, 0005 hours  
MYT, 12 degrees elevation.  This is equivalent to 16 December 2009,  
1605 UTC.

http://www.9w2qc.net/amsatbb/xw-1_171209_0005_MYT_12_deg.mp3

73,
Sion Chow Q. C.,
9W2QC, WQ2C.


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[amsat-bb] Re: XW-1 over Kuala Lumpur, Malaysia

[Mineo Wakita]

XW-1 SSB seems to operate only over China.

36121U 09072A = YAOGAN-8
36122U 09072B = XIWANG-1 (HOPE-1, XW-1)
36123U 09072C = CZ-4C R/B

JE9PEL, Mineo Wakita


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[amsat-bb] Re: XW-1 == YAOGAN 8 ?

[Nigel Gunn G8IFF/W8IFF]

No, Yaogan-8 is the larger main payload, the 8th in  a series of mainly 
civillian imaging satellites.

If we fast forward a few days with the current keps
YAOGAN 8
1 36121U 09072A   09350.14442714 -.0045  0-0  0+0 052
2 36121 100.4979 047.2280 0007533 028.3305 331.8410 13.16397965   131
XIWANG-1 (HOPE-1)
1 36122U 09072B   09350.14452292 -.0045  0-0  0+0 077
2 36122 100.4974 047.2295 0007562 040.0327 320.1583 13.16283842   130

Yaogan takes the lead and Xiwang trails.

Is this correct that the higher mass satellite travels faster than the lower 
mass of XW?



-- 
Nigel A. Gunn,  1865 El Camino Drive, Xenia, OH 45385-1115, USA.  tel +1 937 
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF),  e-mail ni...@ngunn.net   www  
http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pigs QRP Club 
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691,  AMSAT-UK 0182, MKARS,  ALC, 
GCARES, XWARN.

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[amsat-bb] XW-1 == YAOGAN 8 ?

[PE0SAT]

The Keppler data in tle-new.txt has changed the name for object name
2009-072A to YAOGAN8. Is this another official name for XW-1?

73's

--
With regards PE0SAT
Internet web-page http://www.ham.vgnet.nl/


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[amsat-bb] Re: XW-1 over Kuala Lumpur, Malaysia

[Fabiano Moser]

Hello Sion,

It is nice to hear you are back to the satellites, and heard the new China
XW-1 satellite.

Greetings,

73 Fabiano Moser
CT7ABD - PY5RX




2009/12/16 Sion Chow Q. C. (9W2QC) <9w...@9w2qc.net>

> Dear All,
>
> After a long time away from the satellites, I am pleased to report the
> reception of XW-1 over Kuala Lumpur, Malaysia.
>
> Time was 1416 UTC to 1435 UTC and I had a maximum elevation of 68
> degrees.  Managed to copy the beacon on 435.790 CW +/- with a very
> good signal of S9+.  Tried to work the FM and Linear transponder, but
> unfortunately could not get the downlink.
>
> Is the transponder off during this pass?  Time permitting, will try
> out again 1.5 hours from now.
>
> Congratulations to the China team for the very successful launch.
>
> 73,
> Sion Chow Q. C.,
> 9W2QC, WQ2C.
>
>
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-- 
73
Fabiano Moser CT7ABD / PY5RX
ARISS-PORTUGAL (Amateur Radio on the International Space Station)
Representative at Teleconference and Portugal Telebridge Coordinator.
AMRAD/AMSAT-CT
http://www.amrad.pt/ariss.php

"There is no great talent without great will. (Honoré de Balzac)"
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[amsat-bb] XW-1 over Kuala Lumpur, Malaysia

[Sion Chow Q. C. (9W2QC)]

Dear All,

After a long time away from the satellites, I am pleased to report the  
reception of XW-1 over Kuala Lumpur, Malaysia.

Time was 1416 UTC to 1435 UTC and I had a maximum elevation of 68  
degrees.  Managed to copy the beacon on 435.790 CW +/- with a very  
good signal of S9+.  Tried to work the FM and Linear transponder, but  
unfortunately could not get the downlink.

Is the transponder off during this pass?  Time permitting, will try  
out again 1.5 hours from now.

Congratulations to the China team for the very successful launch.

73,
Sion Chow Q. C.,
9W2QC, WQ2C.


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[amsat-bb] EM07, DM97 today

[ted]

If everything goes as planned I'll be in Southern Kansas for the 1906Z 
and 2041Z AO-27 passes this afternoon.

73..tedaa5ck
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[amsat-bb] XW-1 SSB inverting

[Mineo Wakita]

JE1CVL, JH1EKH, BD4SY, JF2CTY, JH1BCL, JA5BLZ succeeded in QSO,
over Japan, 12:36 UTC, 16 Dec 2009.
'V(LSB)/U(USB) Linear Transponder Inverting, Up+Down=581.690',
actually 145.950(Up) / 435.740(Down).

Sat.  No.Uplink   Downlink Beacon   Mode   Callsign
  -  --    ---  -  
XW-1  36122  145.925-975  435.765-715  435.790  SSB inverting  BJ1SA
XW-1  36122  145.825  435.675  435.790  FM_tone 67Hz   BJ1SA

JE9PEL, Mineo Wakita


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[amsat-bb] Re: XW-1 Keps

[Nigel Gunn G8IFF/W8IFF]

YAOGAN 8
1 36121U 09072A   09350.14442714 -.0045  0-0  0+0 052
2 36121 100.4979 047.2280 0007533 028.3305 331.8410 13.16397965   131
XIWANG-1 (HOPE-1)
1 36122U 09072B   09350.14452292 -.0045  0-0  0+0 077
2 36122 100.4974 047.2295 0007562 040.0327 320.1583 13.16283842   130
CZ-4C R/B
1 36123U 09072C   09349.60184546 -.0048  0-0  0+0 041
2 36123 100.4335 046.6805 0157735 026.1217 334.7744 13.4597364340

Nigel Gunn G8IFF/W8IFF wrote:
> Here's the latest from SpaceTrack.
> I wouldn't trust their naming of the objects yet as objects A or C seem to 
> fit XW-1.
> 
> YAOGAN 8
> 1 36121U 09072A   09349.61241651 -.0045  0-0  0+0 048
> 2 36121 100.4991 046.6982 0008204 030.3561 329.8032 13.1639361567
> XIWANG-1 (HOPE-1)
> 1 36122U 09072B   09349.61246623 -.0045  0-0  0+0 065
> 2 36122 100.5034 046.7001 0008781 040.4025 319.7738 13.1627987569
> CZ-4C R/B
> 1 36123U 09072C   09349.60184546 -.0048  0-0  0+0 041
> 2 36123 100.4335 046.6805 0157735 026.1217 334.7744 13.4597364340
> 
> 
> Nigel Gunn G8IFF/W8IFF wrote:
>> Here's a newer set.
>>
>> OBJECT A
>> 1 36121U 09072A   09349.53641119 -.0045  0-0  0+0 031
>> 2 36121 100.5050 046.6267 0007989 035.4736 324.6735 13.1639108550
>> OBJECT B
>> 1 36122U 09072B   09349.60184596 -.0048  0-0  0+0 034
>> 2 36122 100.4355 046.6836 0157547 026.2661 334.6385 13.4597459266
>> OBJECT C
>> 1 36123U 09072C   09349.53641470 -.0045  0-0  0+0 033
>> 2 36123 100.5030 046.6262 0008203 039.9377 320.0405 13.1628602635
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> 
> 
> 
> 
> 
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 9.0.716 / Virus Database: 270.14.108/2566 - Release Date: 12/15/09 
> 07:52:00
> 

-- 
Nigel A. Gunn,  1865 El Camino Drive, Xenia, OH 45385-1115, USA.  tel +1 937 
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF),  e-mail ni...@ngunn.net   www  
http://www.ngunn.net
Member of  ARRL, GQRP #11396, QRPARCI #11644, SOC #548,  Flying Pigs QRP Club 
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691,  AMSAT-UK 0182, MKARS,  ALC, 
GCARES, XWARN.

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[amsat-bb] Re: Programming question - frequency units

[Anthony Monteiro]

Hi Phil,

InstantTune used Hertz and DOUBLE for the configuration
info and the frequency calculations. That way there is
effectively no limits to precision or frequency range.
You get 52 bits for the mantissa in a DOUBLE.

For the actual radio drivers, it used LONG internally for
the frequencies in Hertz. This was done to conserve cpu since
it was meant to run as a DOS TSR on 16 MHz '386 class machines
with no floating point processor.

Given today's PCs, why bother with integers? Hertz and DOUBLE
is simple and there is no cpu issue anymore.

In any case, best of luck with your project,

Tony AA2TX

---

At 02:49 AM 12/16/2009, Phil wrote:
>Thank you for reading this.
>
>After a five year rest from the satellites I may soon be in a 
>position to once
>again resume one of my favourite hobbies. So, over the past couple of
>months I have been updating my tracking programme. In the process I have
>discovered that I need to make a design change.
>
>Originally the whole programme used Hertz as the frequency unit until
>AO-40 came along and the numbers became too large for the int variables.
>It wasn't too difficult, at the time, to change to long variables but I found
>the long strings of numbers confusing especially in the 
>configuration file. So
>then I experimented with double variables in Kilohertz. Around the same
>time AO-40 died and a lifestyle change ended my access to all satellites as
>well.
>
>I've rewritten the configuration class and modelled it around Erich
>Eichmann's sqf Doppler file which has made selecting satellites with multiple
>modes neater. This is where the design decision comes in.
>
>The main class now uses Kilohertz as the frequency unit while the radio
>class still uses Hertz. The main class is responsible for the conversion each
>way but confusion reigns supreme because some variables are in Hertz and
>others in Kilohertz. This is currently causing me a problem where I'm
>modifying the code that takes care of calculating a new uplink frequency
>when the receiver VFO dial is moved.
>
>It seems to me that the best idea is to rewrite the radio class so that it
>accepts double type Kilohertz parameters. This introduces minor frequency
>errors of a few Hertz due to rounding errors but I don't think that is a
>problem since my FT-847 only has a ten Hertz resolution anyway.
>
>Alternatively, I could convert the double frequencies in the configuration
>class to longs and use long variables in all other classes. This 
>will now be a
>more difficult and error prone task to undertake.
>
>To answer my own question, I think working in Kilohertz might be the best
>option but I'd still like to know how others have handled frequency units.
>
>--
>Regards,
>Phil
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[amsat-bb] XW-1 Over Brazil

[PY5LF]

Hello 

Good signal of XW-1 ,  
http://www.youtube.com/watch?v=KXck-pDt9Fg object 2009-072A.

Antenna and radio controlled manually because my SatPC32 don't accept the
Keps sent by Nigel / Mineo . Anyone know how to fix it ?

73

 

 

PY5LF

LUCIANO FABRICIO

CURITIBA-PR-BRAZIL

GG54JM 

  http://www.qrz.com/db/py5lf

  www.falautomation.com.br

 

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[amsat-bb] XW-1 AFSK packet

[Mineo Wakita]

Sorry.

XIWANG-1 (HOPE-1)
1 36122U 09072B   09350.14452292 -.0045  0-0  0+0 077
2 36122 100.4974 047.2295 0007562 040.0327 320.1583 13.16283842   130

AFSK packets were active yesterday over Japan, 12:55 UTC, 15 Dec 2009
Received by JA0CAW, 435.675MHz AFSK 1200bps

12:55 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

12:56 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

12:57 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

JE9PEL, Mineo Wakita


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[amsat-bb] XW-1 AFSK packet

[Mineo Wakita]

昨日は聞こえたという 435.675MHz AFSK 1200bps 信号が、本日(12/16) 夜19:48
からのパスでは聞こえませんでした。しかし、435.790MHz CW 信号は強力でした。

XIWANG-1 (HOPE-1)
1 36122U 09072B   09350.14452292 -.0045  0-0  0+0 077
2 36122 100.4974 047.2295 0007562 040.0327 320.1583 13.16283842   130

AFSK packets were active yesterday over Japan, 12:55 UTC, 15 Dec 2009
Received by JA0CAW, 435.675MHz AFSK 1200bps

12:55 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

12:56 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

12:57 BJ1SA-12>BBSTAT>UI,C,F0 (1191 baud):
Open BJ1SA-12:0

JE9PEL, Mineo Wakita


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[amsat-bb] XW-1 pass Australia

[Andrew Rich]

Australia - Brisbane

ICOM 706 MK II G - 2m 5/8 Whip (I know I know)

16/12/2009 08:30 PM Local - 10 degrees 435.796 MHz USB CW
16/12/2009 08:33 PM Local - 18 degrees 435.796 MHz USB CW
16/12/2009 08:35 PM Local - 28 degrees 435.793 MHz USB CW
16/12/2009 08:37 PM Local - 29 degrees 435.791 MHz USB CW
16/12/2009 08:38 PM Local - 30 degrees 435.790 MHz USB CW
16/12/2009 08:39 PM Local - 28 degrees 435.788 MHz USB CW
16/12/2009 08:39 PM Local - 26 degrees 435.785 MHz USB CW
16/12/2009 08:41 PM Local - 19 degrees 435.784 MHz USB CW
16/12/2009 08:42 PM Local - 17 degrees 435.782 MHz USB CW
16/12/2009 08:43 PM Local - 12 degrees 435.782 MHz USB CW
16/12/2009 08:44 PM Local - 10 degrees 435.782 MHz USB CW


Andrew VK4TEC
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[amsat-bb] Programming question - frequency units

[Phil]

Thank you for reading this.

After a five year rest from the satellites I may soon be in a position to once 
again resume one of my favourite hobbies. So, over the past couple of 
months I have been updating my tracking programme. In the process I have 
discovered that I need to make a design change.

Originally the whole programme used Hertz as the frequency unit until 
AO-40 came along and the numbers became too large for the int variables. 
It wasn't too difficult, at the time, to change to long variables but I found 
the long strings of numbers confusing especially in the configuration file. So 
then I experimented with double variables in Kilohertz. Around the same 
time AO-40 died and a lifestyle change ended my access to all satellites as 
well.

I've rewritten the configuration class and modelled it around Erich 
Eichmann's sqf Doppler file which has made selecting satellites with multiple 
modes neater. This is where the design decision comes in.

The main class now uses Kilohertz as the frequency unit while the radio 
class still uses Hertz. The main class is responsible for the conversion each 
way but confusion reigns supreme because some variables are in Hertz and 
others in Kilohertz. This is currently causing me a problem where I'm 
modifying the code that takes care of calculating a new uplink frequency 
when the receiver VFO dial is moved.

It seems to me that the best idea is to rewrite the radio class so that it 
accepts double type Kilohertz parameters. This introduces minor frequency 
errors of a few Hertz due to rounding errors but I don't think that is a 
problem since my FT-847 only has a ten Hertz resolution anyway.

Alternatively, I could convert the double frequencies in the configuration 
class to longs and use long variables in all other classes. This will now be a 
more difficult and error prone task to undertake.

To answer my own question, I think working in Kilohertz might be the best 
option but I'd still like to know how others have handled frequency units.  

-- 
Regards,
Phil
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