Mike, I don't see any times listed for the Amsat tracking. I think the problem is people are saying that HRD "lags" (ie, the track is correct, but several seconds/minutes behind). Regardless of if that is true or not, what I would suggest to verify HRD's tracking is to open two windows, one with AO-91 or 92 in HRD (realtime, during an actual pass), and one with Amsat Argentina's website:
Be sure to enter your correct grid square and select the correct satellite, and it will tell you current Az/El and doppler frequencies for Uplink and Downlink. I've found this site to be very reliable, and no installs are required (it runs in the browser).
--Roy K3RLD
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Regarding the control of two VFOs simultaneously... we're working on this next. On another note, I've been comparing satellite passes between HRD Satellite Tracking and AMSAT's tracking and I am unable to find any differences. Here's an example with AO-91: http://www.hamradiodeluxe.com/AO-91-Pass-min.png
Mike, WA9PIE
Hello Roy,
Nice check you suggest, possible causes of lag between tracking programs are as you said coincident home location and coincident keplerian data, I do believe most programs are accurate on calculations.
On http://amsat.org.ar/pass Keps are updated 8 times a day, which is important for just launched satellites and ISS.
Real Doppler and AZ/EL computer tracking can be checked using continous carrier trasmitters as LO-19 and CO-55.
73, lu7abf, Pedro
On 2/2/19, Roy Dean [email protected] wrote:
Mike, I don't see any times listed for the Amsat tracking. I think the problem is people are saying that HRD "lags" (ie, the track is correct, but several seconds/minutes behind). Regardless of if that is true or not, what I would suggest to verify HRD's tracking is to open two windows, one with AO-91 or 92 in HRD (realtime, during an actual pass), and one with Amsat Argentina's website:
Be sure to enter your correct grid square and select the correct satellite, and it will tell you current Az/El and doppler frequencies for Uplink and Downlink. I've found this site to be very reliable, and no installs are required (it runs in the browser).
--Roy K3RLD
Regarding the control of two VFOs simultaneously... we're working on this next. On another note, I've been comparing satellite passes between HRD Satellite Tracking and AMSAT's tracking and I am unable to find any differences. Here's an example with AO-91: http://www.hamradiodeluxe.com/AO-91-Pass-min.png
Mike, WA9PIE
Sent via [email protected] 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
Here's a comparison of the AOS times for ISAT. (In HRD Sat Track, the duration is shown below the chart.)
www.hamradiodeluxe.com/SatellitePassComparison.png
I don't see a problem with any of the pass comparisons I've made between HRD SatTrack and the AMSAT data.
The real problem I'm looking at is related to rig control (specific to uplink Doppler frequency calcs) at the moment.
It's worth pointing out that (a) I'm using an HRD build that was generated yesterday and (b) some of you may be using an HRD build that was generated in 2012... or at least quite some time ago.
Mike, WA9PIE
On Sat, Feb 2, 2019 at 7:01 AM Roy Dean [email protected] wrote:
Mike, I don't see any times listed for the Amsat tracking. I think the problem is people are saying that HRD "lags" (ie, the track is correct, but several seconds/minutes behind). Regardless of if that is true or not, what I would suggest to verify HRD's tracking is to open two windows, one with AO-91 or 92 in HRD (realtime, during an actual pass), and one with Amsat Argentina's website:
Be sure to enter your correct grid square and select the correct satellite, and it will tell you current Az/El and doppler frequencies for Uplink and Downlink. I've found this site to be very reliable, and no installs are required (it runs in the browser).
--Roy K3RLD
Regarding the control of two VFOs simultaneously... we're working on this next. On another note, I've been comparing satellite passes between HRD Satellite Tracking and AMSAT's tracking and I am unable to find any differences. Here's an example with AO-91: http://www.hamradiodeluxe.com/AO-91-Pass-min.png
Mike, WA9PIE
Sent via [email protected] 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
I've also created the following change request to ask the developer to add seconds to the AOS time above the Next Passes graph... so the format can be compared to AMSAT or other sources of AOS in the format of hh:mm:ss.
https://development.hamradiodeluxe.com/view.php?id=3152
Mike, WA9PIE
On Sat, Feb 2, 2019 at 12:06 PM Michael Carper, Ph.D. [email protected] wrote:
Here's a comparison of the AOS times for ISAT. (In HRD Sat Track, the duration is shown below the chart.)
www.hamradiodeluxe.com/SatellitePassComparison.png
I don't see a problem with any of the pass comparisons I've made between HRD SatTrack and the AMSAT data.
The real problem I'm looking at is related to rig control (specific to uplink Doppler frequency calcs) at the moment.
It's worth pointing out that (a) I'm using an HRD build that was generated yesterday and (b) some of you may be using an HRD build that was generated in 2012... or at least quite some time ago.
Mike, WA9PIE
On Sat, Feb 2, 2019 at 7:01 AM Roy Dean [email protected] wrote:
Mike, I don't see any times listed for the Amsat tracking. I think the problem is people are saying that HRD "lags" (ie, the track is correct, but several seconds/minutes behind). Regardless of if that is true or not, what I would suggest to verify HRD's tracking is to open two windows, one with AO-91 or 92 in HRD (realtime, during an actual pass), and one with Amsat Argentina's website:
Be sure to enter your correct grid square and select the correct satellite, and it will tell you current Az/El and doppler frequencies for Uplink and Downlink. I've found this site to be very reliable, and no installs are required (it runs in the browser).
--Roy K3RLD
Regarding the control of two VFOs simultaneously... we're working on
this
next. On another note, I've been comparing satellite passes between HRD Satellite Tracking and AMSAT's tracking and I am unable to find any differences. Here's an example with AO-91: http://www.hamradiodeluxe.com/AO-91-Pass-min.png
Mike, WA9PIE
Sent via [email protected] 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
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Michael Carper, Ph.D. -
Pedro Converso -
Roy Dean