HuskySat-1: Telemetry, "FWD Power"
Is HuskySat really only transmitting with 13 mW? If yes, is that healthy? If no, what does that value represent?
--Roy K3RLD
Hi Roy,
It's a great question. Any analysis you can do is helpful. We think the sensor reading is wrong as we can't see a difference in the received signal strength on the ground, but any independent validation of that is greatfully received.
73 Chris
On Sat, Feb 15, 2020, 15:01 Roy Dean via AMSAT-BB amsat-bb@amsat.org wrote:
Is HuskySat really only transmitting with 13 mW? If yes, is that healthy? If no, what does that value represent?
--Roy K3RLD _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Hi Chris and Roy,
... we can't see a difference in the received signal strength on the ground, but any independent validation of that is greatfully received.
Subjective observation is that my received signal seemed weaker for the past 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at 20 degrees fixed elevation on a TV rotor. I've only been able to capture fewer than 50% of the packets compared with reception earlier in the week.
I live on a 100% wooded lot (no leaves since its winter) but all the trees are frosted ala winter wonderland style from passing weather systems since last Thursday. The trees introduce a lot of variability in my received signal depending on which tree I'm pointed at. But my received signal on 435.800 has been noticeably lower even at the "good" patches of sky.
My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
This concurs with my observations the past couple of days also.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of JoAnne K9JKM via AMSAT-BB Sent: Saturday, February 15, 2020 1:39 PM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Hi Chris and Roy,
... we can't see a difference in the received signal > strength on the
ground, but any independent validation of that is > greatfully received.
Subjective observation is that my received signal seemed weaker for the past 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at 20 degrees fixed elevation on a TV rotor. I've only been able to capture fewer than 50% of the packets compared with reception earlier in the week.
I live on a 100% wooded lot (no leaves since its winter) but all the trees are frosted ala winter wonderland style from passing weather systems since last Thursday. The trees introduce a lot of variability in my received signal depending on which tree I'm pointed at. But my received signal on 435.800 has been noticeably lower even at the "good" patches of sky.
My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
-- 73 de JoAnne K9JKM k9jkm@amsat.org _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Could you take a look at the "measurements" page on the HuskySat tab and click on "RF Power" to get a graph of the power that you have been receiving? Mine varies between about -77.5dBm and about 60dBm, (of course it changes during a pass) but I don't see much of a difference in the last day or 2.
Thanks...
On Sat, Feb 15, 2020 at 4:50 PM Mike Lucas via AMSAT-BB amsat-bb@amsat.org wrote:
This concurs with my observations the past couple of days also.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of JoAnne K9JKM via AMSAT-BB Sent: Saturday, February 15, 2020 1:39 PM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Hi Chris and Roy,
... we can't see a difference in the received signal > strength on the
ground, but any independent validation of that is > greatfully received.
Subjective observation is that my received signal seemed weaker for the past 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at 20 degrees fixed elevation on a TV rotor. I've only been able to capture fewer than 50% of the packets compared with reception earlier in the week.
I live on a 100% wooded lot (no leaves since its winter) but all the trees are frosted ala winter wonderland style from passing weather systems since last Thursday. The trees introduce a lot of variability in my received signal depending on which tree I'm pointed at. But my received signal on 435.800 has been noticeably lower even at the "good" patches of sky.
My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
-- 73 de JoAnne K9JKM k9jkm@amsat.org _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Burns and Mike, My telemetry downloads suggest back on the 1st February it was around 125 milli-watts. On the 13 February it had been running 75 milli-watts for some time. Then on the 14th February it dropped to 13 milli-watts. May explain why it has been tough going the last two days. All days quoted are GMT days. 73 Colin VK5HI.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of Burns Fisher via AMSAT-BB Sent: Sunday, 16 February 2020 09:06 To: Mike Lucas documike@comcast.net Cc: AMSAT BB amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Could you take a look at the "measurements" page on the HuskySat tab and click on "RF Power" to get a graph of the power that you have been receiving? Mine varies between about -77.5dBm and about 60dBm, (of course it changes during a pass) but I don't see much of a difference in the last day or 2.
Thanks...
On Sat, Feb 15, 2020 at 4:50 PM Mike Lucas via AMSAT-BB amsat-bb@amsat.org wrote:
This concurs with my observations the past couple of days also.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of JoAnne K9JKM via AMSAT-BB Sent: Saturday, February 15, 2020 1:39 PM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Hi Chris and Roy,
... we can't see a difference in the received signal > strength on
the ground, but any independent validation of that is > greatfully
received.
Subjective observation is that my received signal seemed weaker for the past 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at 20 degrees fixed elevation on a TV rotor. I've only been able to capture fewer than 50% of the packets compared with reception earlier in
the week.
I live on a 100% wooded lot (no leaves since its winter) but all the trees are frosted ala winter wonderland style from passing weather systems since last Thursday. The trees introduce a lot of variability in my received signal depending on which tree I'm pointed at. But my received signal on 435.800 has been noticeably lower even at the "good" patches of sky.
My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
-- 73 de JoAnne K9JKM k9jkm@amsat.org _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
I also agree with the others. Signal strength is down significantly. I’m deciding 3-10 frames a pass now and saw 20-40 a few days ago.
Something is not right
Might be my imagination but the sat frequency seemed to shift a few hundred HZ as well.
Fingers crossed
73, Bob, WB4SON
On Sun, Feb 16, 2020 at 2:43 AM VK5HI via AMSAT-BB amsat-bb@amsat.org wrote:
Burns and Mike, My telemetry downloads suggest back on the 1st February it was around 125 milli-watts. On the 13 February it had been running 75 milli-watts for some time. Then on the 14th February it dropped to 13 milli-watts. May explain why it has been tough going the last two days. All days quoted are GMT days. 73 Colin VK5HI.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of Burns Fisher via AMSAT-BB Sent: Sunday, 16 February 2020 09:06 To: Mike Lucas documike@comcast.net Cc: AMSAT BB amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Could you take a look at the "measurements" page on the HuskySat tab and click on "RF Power" to get a graph of the power that you have been receiving? Mine varies between about -77.5dBm and about 60dBm, (of course it changes during a pass) but I don't see much of a difference in the last day or 2.
Thanks...
On Sat, Feb 15, 2020 at 4:50 PM Mike Lucas via AMSAT-BB < amsat-bb@amsat.org> wrote:
This concurs with my observations the past couple of days also.
-----Original Message----- From: AMSAT-BB amsat-bb-bounces@amsat.org On Behalf Of JoAnne K9JKM via AMSAT-BB Sent: Saturday, February 15, 2020 1:39 PM To: amsat-bb@amsat.org Subject: Re: [amsat-bb] HuskySat-1: Telemetry, "FWD Power"
Hi Chris and Roy,
... we can't see a difference in the received signal > strength on
the ground, but any independent validation of that is > greatfully
received.
Subjective observation is that my received signal seemed weaker for the past 2 or so days. The antenna I'm using is a 7 element yagi on 435.800 at 20 degrees fixed elevation on a TV rotor. I've only been able to capture fewer than 50% of the packets compared with reception earlier in
the week.
I live on a 100% wooded lot (no leaves since its winter) but all the trees are frosted ala winter wonderland style from passing weather systems since last Thursday. The trees introduce a lot of variability in my received signal depending on which tree I'm pointed at. But my received signal on 435.800 has been noticeably lower even at the "good" patches of sky.
My HuskySat telemetry at 2125Z said Forward Power = 13.4 mW.
-- 73 de JoAnne K9JKM k9jkm@amsat.org _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
I also noticed it Roy, enough of a difference that I looked up the power output in the telem and saw that at least according to it power has been dropped. I'm running a m2 436cp30 at 30 feet with a SSB preamp, and previously I have seen S9+ signals, the last couple of passes have been S5-S6 on a IC-9100.
Now it is winter and cloud cover makes a difference and if I have a inch of inch around the antenna I hear "nothing" and of course there is propagation as a variable, but something has changed.
The command ops are the only ones that can really confirm the power change.
73 Kevin wa7fwf
On 2/15/2020 11:59, Roy Dean via AMSAT-BB wrote:
Is HuskySat really only transmitting with 13 mW? If yes, is that healthy? If no, what does that value represent?
--Roy K3RLD _______________________________________________ Sent via AMSAT-BB@amsat.org. 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: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (8)
-
Bob -
Burns Fisher -
Chris Thompson -
cjhurst＠bigpond.net.au -
JoAnne K9JKM -
Kevin -
Mike Lucas -
Roy Dean