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CX2SA > SATDIG 30.12.16 22:40l 936 Lines 32315 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. BY70-1 keps (Matthew Stevens)
2. Re: BY70-1 (PY5LF)
3. Re: Unsuccessful attempts to make APRS contacts through ISS
or NO-84 (Robert Bruninga)
4. Re: Questions On Balloons With Amateur Packages (Robert Bruninga)
5. Re: BY70-1 (Greg D)
6. Weekend Rover Trip (Gabriel Zeifman)
7. Re: BY70-1 (Mark Johns)
8. Re: BY70-1 (Nico Janssen)
9. BY70-1 Keps Test (Pedro Converso)
10. Re: BY70-1 (Paul Stoetzer)
11. Re: BY70-1 (Joe)
12. Re: Channel settings to work BY70-1 (Mac A. Cody)
----------------------------------------------------------------------
Message: 1
Date: Fri, 30 Dec 2016 08:30:31 -0500
From: Matthew Stevens <matthew@xxxxxxxxx.xxx>
To: "Keith O'Brien via AMSAT-BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] BY70-1 keps
Message-ID:
<CAN8zKtRHvb0+2Os4=OFWiaYhPmXm+E3CxamtBoeNFZxggU=o2g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
In case anyone hadn't noticed yet, as of this morning the updated keps for
BY70-1 are now included in the AMSAT TLE files.
BY70-1
1 41909U 16083C 16365.16421467 -.00000714 22552-5 00000+0 0 9996
2 41909 97.5944 76.7683 0224722 359.4963 1.4979 15.67163154 300
- Matthew
? KK4FEM?
------------------------------
Message: 2
Date: Fri, 30 Dec 2016 11:42:52 -0200
From: PY5LF <py5lf@xxxxxxxxxxxxx.xxx.xx>
To: Nico Janssen <hamsat@xxxxxx.xx>
Cc: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] BY70-1
Message-ID:
<CAAy53m6b51Ri-HKO2cBBUZY1npGKqwJd_AXTHyvgFiL3gE5+Lw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Nico
Thank you for the explanation.
I got the fresh Tles from Celestrack today, but looks not correct.
Regards
2016-12-30 11:14 GMT-02:00 Nico Janssen <hamsat@xxxxxx.xx>:
>
> If you are still using yesterday's TLE set, then you will indeed find
> that BY70-1 is now about half a minute earlier. The problem is that
> the TLEs for this satellite are not stable yet in the first days after the
> launch. The right value for e.g. the decay rate has not yet been
> established. So for the time being you need to make sure you use the
> most recent TLE set that is available.
>
> By the way, the two SuperView satellites are now using their own
> propulsion system to increase their altitude, preventing an early decay.
> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>
> 73,
> Nico PA0DLO
>
>
> On 30-12-16 13:42, PY5LF wrote:
>
>> Hi
>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>> wrong .
>> I start to hear 25 seconds before . Does anyone feels the same ?
>> 73
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views of
>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
>
------------------------------
Message: 3
Date: Fri, 30 Dec 2016 11:08:20 -0500
From: Robert Bruninga <bruninga@xxxx.xxx>
To: "hdskullfire2 ." <hdskullfire2@xxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Unsuccessful attempts to make APRS contacts
through ISS or NO-84
Message-ID: <9e66624a8c6ef5b6535127047a16b532@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
> On both birds I use CQ & Ariss during the outgoing TX attempts but
nothing.
What do you mean "use"? CQ never is a digipeater path, SO me thinks you
are using them in the TOCALL and not in the VIA path?
Bob
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
hdskullfire2 .
Sent: Monday, December 26, 2016 9:50 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Unsuccessful attempts to make APRS contacts through
ISS or NO-84
I've been trying and trying to make APRS contacts through ISS (UHF) and
NO-84 (VHF) for some time now and have been unsuccessful in all attempts
even in cases where the bird was plenty high or right over my head. Here's
my working conditions..
Icom IC-9100 using a microKeyer II (MKII) as the interface. SatPC32ISS,
UISS (Pro Version), UZ7HO Soundmodem. The antenna array is a m2 Leo-Pack
and the rotator is a Yaesu G5500 being controlled with a Green Heron AZ-EL
unit. All software is the latest. Doppler shifting is working fine as
SatPC32ISS, IC-9100, and GH controller are talking to each other without
issues. I've listened to the outgoing sound of the packet and did not hear
anything unusual. In almost every case I've tried the lowest power and
increased power at varying levels without luck. I've monitored the
outgoing audio and adjusted the TX on the MKII to varying levels to make
sure the audio of the packet was not over cooked.
>From what I can tell everything is working well together and I can see
incoming packets from other stations decoding on UISS and Soundmodem.
However when I TX... No hits whatsoever. When I tested the system on the
local APRS frequency it works fine and other stations are digipeating my
packet signal.
I'm coming to the conclusion that this must be a problem with my settings
in either Soundmodem or perhaps UISS. The packets going up never get
repeated. On both birds I use CQ & Ariss (Tried others too) during the
outgoing TX attempts but nothing. I would really like if someone who uses
a similar setup and has things working to contact me.
I'm at wits end and now curtailing any further attempts until I get some
information on what may be going on..
Steve Nordahl, NS3L
Nazareth, Pa.
NS3L(at)Yahoo(dot)com
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to
all interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Fri, 30 Dec 2016 12:19:53 -0500
From: Robert Bruninga <bruninga@xxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Questions On Balloons With Amateur Packages
Message-ID: <0d7f2be72489c8f3d5b26068f0737cd1@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
We tried zero pressure balloons (Mylar party balloons) but the max
possible height was just 23,000 feet or so due to the weight of the
balloon itself. It's a direct calculation. So we paralleled balloons,
but still, no matter how many balloons you add, the math still comes out
to asymptotically approach the same max altitude due to the mass of the
balloon material itself and its volume.
We did learn one other thing. With 5 under filled Mylar balloons to reach
a cruise altitude around 23,000 feet (from memory?) we sent the cut-down
command and nothing happened. (launching from Maryland is a guaranteed
ocean landing unless you can come down in 65 miles or so)...
On recovery, we found one balloon had burst, and so it hung DOWN from the
other 4 and got all wrapped around the payload. So when we sent the
cut-down command, it worked, but the entangled lines kept everything
together.
But now with only 4 of the 5 balloons providing lift, it came down at a
very slow rate... about the same as the ascent rate... which means we
chased it TWICE as far as intended.
Oh the fun of discovery!
The event is shown on our web page (Spycam mission starts about 30% down
the page) http://aprs.org/balloons.html
Bob, Wb4APR
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Richard
Tejera
Sent: Friday, December 23, 2016 3:08 PM
To: Dave Marthouse; 'AMSAT'
Subject: Re: [amsat-bb] Questions On Balloons With Amateur Packages
Dave,
Knowing the weight of the payload, they will fill it with enough gas to
become neutrally buoyant at the target altitude.
If altitude is the goal, enough gas will be filled to take it to an
altitude that will exceed the Burt diameter.
Rick Tejera K7TEJ
Saguaro Astronomy Club
www.SaguaroAstro.org
Thunderbird Amateur Radio Club
www.w7tbc.org
On December 23, 2016, at 11:01, Dave Marthouse <dmarthouse@xxxxx.xxx>
wrote:
I have seen posts from time to time on the BB about balloons with amateur
radio payloads on them.
I've got a question regarding the missions that carry payloads around
the world. What stops the balloons from going up until they explode do
to the high altitude. How are the packages kept from doing this to
achieve such long distance flights?
--
Dave Marthouse N2AAM
dmarthouse@xxxxx.xxx
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Fri, 30 Dec 2016 10:43:16 -0800
From: Greg D <ko6th.greg@xxxxx.xxx>
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] BY70-1
Message-ID: <5866AAC4.2040306@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
18:20 pass not as strong as prior passes. Only got a few moments of
full-quieting audio. Contacts with W5ACM and KC7M. As before, the
second half of the pass was much better (nothing heard at all until just
before indicated TCA), so perhaps the bird is late compared to the
Keps. Worked it almost into the ground before LOS. I'm using
2016-083C, updated from Celestrak right before the pass. Playing with
polarization seemed to help, but I'm assuming the bird's antennas are
linear, right? Possibly my relays are getting dirty.
One question, for scale... We know that the satellite will not last
"long", given it's crippled orbit. How long? Days? Weeks? Months?
Greg KO6TH
Nico Janssen wrote:
>
> If you are still using yesterday's TLE set, then you will indeed find
> that BY70-1 is now about half a minute earlier. The problem is that
> the TLEs for this satellite are not stable yet in the first days after
> the
> launch. The right value for e.g. the decay rate has not yet been
> established. So for the time being you need to make sure you use the
> most recent TLE set that is available.
>
> By the way, the two SuperView satellites are now using their own
> propulsion system to increase their altitude, preventing an early decay.
> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>
> 73,
> Nico PA0DLO
>
>
> On 30-12-16 13:42, PY5LF wrote:
>> Hi
>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>> wrong .
>> I start to hear 25 seconds before . Does anyone feels the same ?
>> 73
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views
>> of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Fri, 30 Dec 2016 12:06:08 -0600
From: Gabriel Zeifman <gabrielzeifman@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Weekend Rover Trip
Message-ID:
<CAEGYLCvBX5B3aJTJ4iriCmo5ofEGN-x-VUYPhP3RPe6Tw04nsw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hello fellow people of the birds,
I will once again be venturing into the unknown to activate rare grids. The
primary goals of this trip will be EN02 and EN04. Appearances by NJ7H/VE3
and VE4 are possible. States that I will likely visit include KS, NE, SD,
NE, MN, IA, MO, and Canadian provinces MB and ON.
QRV all sats (linear/FM/packet) and available for requests. Will be on APRS
as NJ7H-9 and iridium tracking at share.delorme.com/gz. If I'm in a
grid/state you need, shoot me a message. Updates will be posted on twitter
NJ7H_Radio. Due to the unpredictable nature of roving, no pass schedule
will be made ahead of time. I try to give warning when I am "pass assured".
EO30/40 are possible as the very extent of possibilities on the very
ambitious side of this trip, as is EN29 from the US side in the US exclave
of the Northwest Angle. Hope to see you all on the birds!
73,
Gabe
NJ7H
NJ7H@xxxxx.xxx
------------------------------
Message: 7
Date: Fri, 30 Dec 2016 19:20:24 +0000 (UTC)
From: Mark Johns <mjohns166@xxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>, AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] BY70-1
Message-ID: <770901661.4023448.1483125624343@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
When I put keps for BY70-1 into SatPC32 (either yesterday's keps or
today's), it pops up a box that says, "E/A - Fehler 105." SatPC32 freezes up.
Does anyone know what this error code means? Anyone else getting it?
--
Mark D. Johns, K?MDJ Decorah, Iowa USA EN43
-----------------------------------------------
"Heaven goes by favor; if it went by merit,
you would stay out and your dog would go in."
---Mark Twain
----- Original Message -----
From: Greg D <ko6th.greg@xxxxx.xxx>
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Sent: Friday, December 30, 2016 12:43 PM
Subject: Re: [amsat-bb] BY70-1
18:20 pass not as strong as prior passes. Only got a few moments of
full-quieting audio. Contacts with W5ACM and KC7M. As before, the
second half of the pass was much better (nothing heard at all until just
before indicated TCA), so perhaps the bird is late compared to the
Keps. Worked it almost into the ground before LOS. I'm using
2016-083C, updated from Celestrak right before the pass. Playing with
polarization seemed to help, but I'm assuming the bird's antennas are
linear, right? Possibly my relays are getting dirty.
One question, for scale... We know that the satellite will not last
"long", given it's crippled orbit. How long? Days? Weeks? Months?
Greg KO6TH
Nico Janssen wrote:
>
> If you are still using yesterday's TLE set, then you will indeed find
> that BY70-1 is now about half a minute earlier. The problem is that
> the TLEs for this satellite are not stable yet in the first days after
> the
> launch. The right value for e.g. the decay rate has not yet been
> established. So for the time being you need to make sure you use the
> most recent TLE set that is available.
>
> By the way, the two SuperView satellites are now using their own
> propulsion system to increase their altitude, preventing an early decay.
> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>
> 73,
> Nico PA0DLO
>
>
> On 30-12-16 13:42, PY5LF wrote:
>> Hi
>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>> wrong .
>> I start to hear 25 seconds before . Does anyone feels the same ?
>> 73
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views
>> of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
> are solely those of the author, and do not reflect the official views
> of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 8
Date: Fri, 30 Dec 2016 20:45:21 +0100
From: Nico Janssen <hamsat@xxxxxx.xx>
To: Greg D <ko6th.greg@xxxxx.xxx>, AMSAT-BB <AMSAT-BB@xxxxx.xxx>
Subject: Re: [amsat-bb] BY70-1
Message-ID: <7553536a-f066-e05c-11d8-631f1e9877aa@xxxxxx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
As long as we don't have stable TLEs it is not possible to perform
an analysis to determine the expected lifetime. But my initial
guestimate would be somewhere between 2 and 6 months.
73, Nico
On 30-12-16 19:43, Greg D wrote:
> 18:20 pass not as strong as prior passes. Only got a few moments of
> full-quieting audio. Contacts with W5ACM and KC7M. As before, the
> second half of the pass was much better (nothing heard at all until just
> before indicated TCA), so perhaps the bird is late compared to the
> Keps. Worked it almost into the ground before LOS. I'm using
> 2016-083C, updated from Celestrak right before the pass. Playing with
> polarization seemed to help, but I'm assuming the bird's antennas are
> linear, right? Possibly my relays are getting dirty.
>
> One question, for scale... We know that the satellite will not last
> "long", given it's crippled orbit. How long? Days? Weeks? Months?
>
> Greg KO6TH
>
>
> Nico Janssen wrote:
>> If you are still using yesterday's TLE set, then you will indeed find
>> that BY70-1 is now about half a minute earlier. The problem is that
>> the TLEs for this satellite are not stable yet in the first days after
>> the
>> launch. The right value for e.g. the decay rate has not yet been
>> established. So for the time being you need to make sure you use the
>> most recent TLE set that is available.
>>
>> By the way, the two SuperView satellites are now using their own
>> propulsion system to increase their altitude, preventing an early decay.
>> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>>
>> 73,
>> Nico PA0DLO
>>
>>
>> On 30-12-16 13:42, PY5LF wrote:
>>> Hi
>>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>>> wrong .
>>> I start to hear 25 seconds before . Does anyone feels the same ?
>>> 73
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed
>>> are solely those of the author, and do not reflect the official views
>>> of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>> program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views
>> of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Fri, 30 Dec 2016 16:45:48 -0300
From: Pedro Converso <pconver@xxxxx.xxx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] BY70-1 Keps Test
Message-ID:
<CANTZqKmBi=OaU+Cs0yy6nR27Q9C7QpF-XAZ-TiGuiquTx2+BXw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Given comments that BY70-1 Object 41909 is later than expected, Object
41910 shows 4 minutes earlier.
This Object 41910 is available for tracking as BY702 as additional
alternative.
You can use this at http://amsat.org.ar/pass.htm clicking on BY702.
Comments, checks, welcome
73, lu7abf, Pedro
------------------------------
Message: 10
Date: Fri, 30 Dec 2016 19:49:16 +0000
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: AMSAT-BB <AMSAT-BB@xxxxx.xxx>, Greg D <ko6th.greg@xxxxx.xxx>,
Nico Janssen <hamsat@xxxxxx.xx>
Subject: Re: [amsat-bb] BY70-1
Message-ID:
<CABzOSOof-AzNX=w0taH8wn81ZvyfnsJs1E585YT24dPLmaXT+Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I put the parameters from yesterday's TLEs into NASA's DAS software. The
mass is listed at 2 kg, so the unknown variable is the cross sectional
surface area. It's a 2U cubesat with deployed solar panels. With one
estimate, I got 6 days, which is obviously wrong. With another estimate, I
got 96 days.
73,
Paul, N8HM
On Fri, Dec 30, 2016 at 14:45 Nico Janssen <hamsat@xxxxxx.xx> wrote:
>
>
> As long as we don't have stable TLEs it is not possible to perform
>
> an analysis to determine the expected lifetime. But my initial
>
> guestimate would be somewhere between 2 and 6 months.
>
>
>
> 73, Nico
>
>
>
> On 30-12-16 19:43, Greg D wrote:
>
> > 18:20 pass not as strong as prior passes. Only got a few moments of
>
> > full-quieting audio. Contacts with W5ACM and KC7M. As before, the
>
> > second half of the pass was much better (nothing heard at all until just
>
> > before indicated TCA), so perhaps the bird is late compared to the
>
> > Keps. Worked it almost into the ground before LOS. I'm using
>
> > 2016-083C, updated from Celestrak right before the pass. Playing with
>
> > polarization seemed to help, but I'm assuming the bird's antennas are
>
> > linear, right? Possibly my relays are getting dirty.
>
> >
>
> > One question, for scale... We know that the satellite will not last
>
> > "long", given it's crippled orbit. How long? Days? Weeks? Months?
>
> >
>
> > Greg KO6TH
>
> >
>
> >
>
> > Nico Janssen wrote:
>
> >> If you are still using yesterday's TLE set, then you will indeed find
>
> >> that BY70-1 is now about half a minute earlier. The problem is that
>
> >> the TLEs for this satellite are not stable yet in the first days after
>
> >> the
>
> >> launch. The right value for e.g. the decay rate has not yet been
>
> >> established. So for the time being you need to make sure you use the
>
> >> most recent TLE set that is available.
>
> >>
>
> >> By the way, the two SuperView satellites are now using their own
>
> >> propulsion system to increase their altitude, preventing an early decay.
>
> >> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>
> >>
>
> >> 73,
>
> >> Nico PA0DLO
>
> >>
>
> >>
>
> >> On 30-12-16 13:42, PY5LF wrote:
>
> >>> Hi
>
> >>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>
> >>> wrong .
>
> >>> I start to hear 25 seconds before . Does anyone feels the same ?
>
> >>> 73
>
> >>> _______________________________________________
>
> >>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>
> >>> to all interested persons worldwide without requiring membership.
>
> >>> Opinions expressed
>
> >>> are solely those of the author, and do not reflect the official views
>
> >>> of AMSAT-NA.
>
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Message: 11
Date: Fri, 30 Dec 2016 14:00:46 -0600
From: Joe <nss@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] BY70-1
Message-ID: <a0730a5e-f66e-37a3-ed61-7062146f048d@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
And when we know this, re-entry window, wouldn't it be neat if someone
could catch it on video coming back in?
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 12/30/2016 12:43 PM, Greg D wrote:
> 18:20 pass not as strong as prior passes. Only got a few moments of
> full-quieting audio. Contacts with W5ACM and KC7M. As before, the
> second half of the pass was much better (nothing heard at all until just
> before indicated TCA), so perhaps the bird is late compared to the
> Keps. Worked it almost into the ground before LOS. I'm using
> 2016-083C, updated from Celestrak right before the pass. Playing with
> polarization seemed to help, but I'm assuming the bird's antennas are
> linear, right? Possibly my relays are getting dirty.
>
> One question, for scale... We know that the satellite will not last
> "long", given it's crippled orbit. How long? Days? Weeks? Months?
>
> Greg KO6TH
>
>
> Nico Janssen wrote:
>> If you are still using yesterday's TLE set, then you will indeed find
>> that BY70-1 is now about half a minute earlier. The problem is that
>> the TLEs for this satellite are not stable yet in the first days after
>> the
>> launch. The right value for e.g. the decay rate has not yet been
>> established. So for the time being you need to make sure you use the
>> most recent TLE set that is available.
>>
>> By the way, the two SuperView satellites are now using their own
>> propulsion system to increase their altitude, preventing an early decay.
>> As BY70-1 does not have any propulsion, it is stuck in its low orbit.
>>
>> 73,
>> Nico PA0DLO
>>
>>
>> On 30-12-16 13:42, PY5LF wrote:
>>> Hi
>>> We had a low pass over here minutes ago and i felt the keps BY70-1 are
>>> wrong .
>>> I start to hear 25 seconds before . Does anyone feels the same ?
>>> 73
>>> _______________________________________________
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> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
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expressed
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AMSAT-NA.
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------------------------------
Message: 12
Date: Fri, 30 Dec 2016 14:27:43 -0600
From: "Mac A. Cody" <maccody@xxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Channel settings to work BY70-1
Message-ID: <fb33a27c-1be8-1921-79b0-19f3509492b9@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
For those interested, I used the channel settings below for the
1642 UTC pass of BY70-1. I was able to complete two QSO and I
could hear a number of other stations. It was a busy pass!
73,
Mac / AE5PH
On 12/29/2016 11:10 PM, Mac A. Cody wrote:
> Greetings,
>
> I'm looking at setting up my hand-held radios to attempt to
> work BY70-1. Given that my radios have a minimum step size
> of 2.5 KHz, I'm trying to set them up to account for the
> frequency sensitivity of BY70-1. I am going to use the
> channel set listed as follows:
>
> CH RX TX TX Tone
> BY70-1 436.2100 145.9175 67 Hz
> BY70-2 436.2075 145.9175 67 Hz
> BY70-3 436.2050 145.9175 67 Hz
> BY70-4 436.2025 145.9200 67 Hz
> BY70-5 436.2000 145.9200 67 Hz
> BY70-6 436.1975 145.9200 67 Hz
> BY70-7 436.1950 145.9225 67 Hz
> BY70-8 436.1925 145.9225 67 Hz
> BY70-9 436.1900 145.9225 67 Hz
>
> Does anyone see anything errant is this plan, such as a shift
> in the base TX or RX frequencies? If so, please let me know.
> Otherwise, I hope that this channel set may be useful to
> others.
>
> 73,
>
> Mac / AE5PH
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------------------------------
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End of AMSAT-BB Digest, Vol 11, Issue 409
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