A statement/opinion like that is worthless without some solid data. You can't just malign the guy. Simon says he used David Taylor's open source satellite-tracking library to get started and wrote his own library, shipped as a dll with HRD and based on NORAD SGP4/SDP4 implementations by Michael F. Henry. I don't have a clue what all that means but it sounds like Simon's program was not just cobbled together.
SATPC32 looks to me like an 80's dos program. Very unattractive.
It is not logical to state that 'Everybody' in the entire sat community has problems with HRD's Doppler.
I want more proof
K7TRK
_____
From: kq6ea@verizon.net [mailto:kq6ea@verizon.net] Sent: Thursday, September 22, 2011 4:23 PM To: k7trkradio@charter.net; tomdoyle1948@gmail.com; AMSAT-BB@amsat.org Subject: Re: [amsat-bb] Re: Two Questions
try SatPC32. *Everybody* I know who uses HRD has problems with the Doppler correction.
Jim KQ6EA
On 09/22/11, Tedk7trkradio@charter.net wrote:
"Are the linear sats too complicated? Do people not have SSB and CW equipment or are they just not interested anymore."
Tom, speaking only for me, I have tried several times to work a linear. I have a TS 2000 with the sat function and HRD sat program which allegedly adjust the Doppler, 2m/440 SSB and a Elk on a rotor w/fixed el.. Try as I might, I cannot get the tx and rx to match so I can duplex.
There just does not seem to be single primer that one can follow on how to accomplish the process. There are multiple opinions from individuals, but not much of a consensus on a good standard process. Admittedly, I have problem not given a fair amount of time on my technique as I was concentrating on VUCC. Now that that will go to the card checker tomorrow, I need to spend some time on the linear. I just wish there was a 'manual'
73, Ted K7TRK
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Thomas Doyle Sent: Thursday, September 22, 2011 12:02 PM To: AMSAT-BB@amsat.org Subject: [amsat-bb] Two Questions
I have two questions that I have wondered about for quite a while.
There was a gap in my satellite activity of 20 years or so. AO-10 was the last satellite I used a lot. Not sure what sparked my interest again but I have been having a great time on the satellites. Right from the beginning I noticed that things have changed a lot. I have made about 70 contacts on CW, SSB and FM. Most of the contacts have been on FM.
Question 1 relates to activity levels. I have 270 something countries on HF so I have been in my share of DX pileups. What I find really strange is how there will be the usual horrific pile up on AO-51 and then when an FO-29 pass comes a short time later there will usually be no one on. I realize the emphasis is all on "keeping it simple" but wonder how this change occurred. Did it happen all at once - did it happen when the last HEO satellite died. Are the linear sats too complicated. Do people not have SSB and CW equipment or are they just not interested anymore.
Question 2 relates to the rest of the world. I notice that FO-29, which seems to be the best linear satellite, came from Japan. What is activity like in Japan/Europe and the rest of the world outside the US. Is it mostly just FM on V/U sats. I believe the current US effort is an FM only Fox with a linear sat in the "2015 time frame". Since the FO-29 activity is almost zero it would see strange to put up another US linear sat at any time. As old as I am the "2015 time frame" might be beyond my chicken little date so I wonder if there are there any LEO linear sats in the works in other parts of the world.
I am not complaining I just wonder what happened and what the future holds. Feel free to reply directly.
73 W9KE tom ... AMSAT LM 0875
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb