[time-nuts] Re: LH "No usable sats"
On 7/6/21 5:26 PM, Bob kb8tq wrote: Hi The location comes out in Corsica. Running a fast simulation, he’s got a hole from about 330 degrees over to 30 degrees AZ and from 0 to about 50 degrees EL. Bob OK.. that makes sense GPS orbit inclination is 55 degrees. If you plot the ground track, it just touches 55N and 55S (i.e. there are times during the orbit when the satellite is directly overhead the latitude = inclination), so you'd have to be north (or south) of 55, to have an actual hole to the north (all the way to the zenith). Now, it's true that at 40N, there's not a lot of satellites to the north, and they'll be high elevation, all above 50 degrees is reasonable. On Jul 6, 2021, at 8:12 PM, Lux, Jim wrote: On 7/6/21 5:06 PM, Bill Beam wrote: Bob, This is not an issue for an observer in AZ. GPS birds have orbit inclination 55-60deg and should be seen anywhere in the sky from AZ. AZ observer just needs to wait long enough for one to pass to the north. AZ in this case = Azimuth OP is in Portugal, or at least his email is.. But, in fact, Portugal isn't that far north, I'd expect some sats to the north (at high elevation) On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: Hi There are no GPS sats flying over the north or south poles. Bob On Jul 6, 2021, at 6:13 PM, Admin wrote: Testing two different Z3801A, I wonder why I cannot receive GPS birds outside AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. Your info will be very much appreciated. -- ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. Bill Beam NL7F ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
On 7/6/21 5:14 PM, Bob kb8tq wrote: Hi The observer (at 41 deg 21 min N) is *north* of where I live. I most certainly am located in an area that has a “blank” over the north pole. Bob GPS orbit inclination is 55 degrees. If you plot the ground track, it just touches 55N and 55S (i.e. there are times during the orbit when the satellite is directly overhead the latitude = inclination), so you'd have to be north (or south) of 55, to have an actual hole to the north. Now, it's true that at 40N, there's not a lot of satellites to the north, and they'll be high elevation. On Jul 6, 2021, at 8:06 PM, Bill Beam wrote: Bob, This is not an issue for an observer in AZ. GPS birds have orbit inclination 55-60deg and should be seen anywhere in the sky from AZ. AZ observer just needs to wait long enough for one to pass to the north. On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: Hi There are no GPS sats flying over the north or south poles. Bob On Jul 6, 2021, at 6:13 PM, Admin wrote: Testing two different Z3801A, I wonder why I cannot receive GPS birds outside AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. Your info will be very much appreciated. -- ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. Bill Beam NL7F ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
Hi The location comes out in Corsica. Running a fast simulation, he’s got a hole from about 330 degrees over to 30 degrees AZ and from 0 to about 50 degrees EL. Bob > On Jul 6, 2021, at 8:12 PM, Lux, Jim wrote: > > On 7/6/21 5:06 PM, Bill Beam wrote: >> Bob, >> This is not an issue for an observer in AZ. >> GPS birds have orbit inclination 55-60deg and should be seen anywhere in the >> sky from AZ. >> AZ observer just needs to wait long enough for one to pass to the north. > > > AZ in this case = Azimuth > > OP is in Portugal, or at least his email is.. > > But, in fact, Portugal isn't that far north, I'd expect some sats to the > north (at high elevation) > > > > >> On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: >> >>> Hi >>> There are no GPS sats flying over the north or south poles. >>> Bob On Jul 6, 2021, at 6:13 PM, Admin wrote: Testing two different Z3801A, I wonder why I cannot receive GPS birds outside AZ : 290 to 315 deg. My horizon is clear and EL and >> AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. Your info will be very much appreciated. -- ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. >>> ___ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >>> an email to time-nuts-le...@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> >> Bill Beam >> NL7F >> >> >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >> > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
Hi The observer (at 41 deg 21 min N) is *north* of where I live. I most certainly am located in an area that has a “blank” over the north pole. Bob > On Jul 6, 2021, at 8:06 PM, Bill Beam wrote: > > Bob, > This is not an issue for an observer in AZ. > GPS birds have orbit inclination 55-60deg and should be seen anywhere in the > sky from AZ. > AZ observer just needs to wait long enough for one to pass to the north. > > On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: > >> Hi > >> There are no GPS sats flying over the north or south poles. > >> Bob > >>> On Jul 6, 2021, at 6:13 PM, Admin wrote: >>> >>> Testing two different Z3801A, I wonder why I cannot receive GPS birds >>> outside AZ : 290 to 315 deg. My horizon is clear and EL and > AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. >>> >>> Your info will be very much appreciated. >>> >>> -- >>> ___ >>> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send >>> an email to time-nuts-le...@lists.febo.com >>> To unsubscribe, go to and follow the instructions there. >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > > > Bill Beam > NL7F > > > ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
On 7/6/21 5:06 PM, Bill Beam wrote: Bob, This is not an issue for an observer in AZ. GPS birds have orbit inclination 55-60deg and should be seen anywhere in the sky from AZ. AZ observer just needs to wait long enough for one to pass to the north. AZ in this case = Azimuth OP is in Portugal, or at least his email is.. But, in fact, Portugal isn't that far north, I'd expect some sats to the north (at high elevation) On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: Hi There are no GPS sats flying over the north or south poles. Bob On Jul 6, 2021, at 6:13 PM, Admin wrote: Testing two different Z3801A, I wonder why I cannot receive GPS birds outside AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. Your info will be very much appreciated. -- ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. Bill Beam NL7F ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
Bob, This is not an issue for an observer in AZ. GPS birds have orbit inclination 55-60deg and should be seen anywhere in the sky from AZ. AZ observer just needs to wait long enough for one to pass to the north. On Tue, 6 Jul 2021 18:55:22 -0400, Bob kb8tq wrote: >Hi >There are no GPS sats flying over the north or south poles. >Bob >> On Jul 6, 2021, at 6:13 PM, Admin wrote: >> >> Testing two different Z3801A, I wonder why I cannot receive GPS birds >> outside AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. >> >> Your info will be very much appreciated. >> >> -- >> ___ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >> email to time-nuts-le...@lists.febo.com >> To unsubscribe, go to and follow the instructions there. >___ >time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an >email to time-nuts-le...@lists.febo.com >To unsubscribe, go to and follow the instructions there. Bill Beam NL7F ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: LH "No usable sats"
Hi There are no GPS sats flying over the north or south poles. Bob > On Jul 6, 2021, at 6:13 PM, Admin wrote: > > Testing two different Z3801A, I wonder why I cannot receive GPS birds outside > AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg > and 1.0, respectively. Position: 41 21 N ; 08 23 W. > > Your info will be very much appreciated. > > -- > ___ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] LH "No usable sats"
Testing two different Z3801A, I wonder why I cannot receive GPS birds outside AZ : 290 to 315 deg. My horizon is clear and EL and AMU filters are 10 deg and 1.0, respectively. Position: 41 21 N ; 08 23 W. Your info will be very much appreciated. -- ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
[time-nuts] Re: 20th year of time nuts mailing list
On 1/1/21 4:02 pm, Tom Van Baak wrote: > Hello time nuts, > > Ah, it is 2021-01-01 (JD 2459215.5, MJD 59215) which is nice because > that means it's not 2020 anymore. > > One reason I've been looking forward to 2021 is that it's now officially > the 20th year of the time nuts mailing list. So this is a note to say > *thank you* to everyone for making it so amazing over the years. I get > comments all the time about this mailing list; its depth, its high SNR, > its focus, its vast archive of quality postings, and especially, the > community that evolved around the list. > > On the web the phrase "time nut" is now a proper noun, sometimes an > adjective, or occasionally a diagnosis or disease. Never in my wildest > dreams did I think any of this would happen. I thought my early interest > in nixie tubes, clocks, electronics, and precise timing might be a > passing phase, and that the frequency of eBay purchases would fade. But > no. This turns out to be an incredibly wide, deep, interesting, and > rewarding hobby. The mailing list started with 6 people (half of whom > are still active) and we now have 1850 members. [1] Having just caught up on almost 2 years of backlog, I just want to reinforce what an incredible community this list is. My day job and various other events through 2020 (somehow the pandemic was the least of all) have meant I've done almost no time stuff since mid-2019. The one exception being trying out a comparison of my house rubidium (my old apartment didn't have a usable sky view for GPS) vs the frequency output of a LeoNTP, amazingly, despite the rubidium (an ancient Efratom FRK) being over 20 years out of cal, the two agree past 9 digits on an SRS SR620, one used as reference, the other input, was just the quickest way to get a rough idea. ___ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
