In the IARU Region 1 band plan, 94 nations (a majority of IARU member societies) have concurred on 144.4905 MHz (144.489 MHz dial) as the designated world-wide WSPR frequency on 2 meters.The G4ILO WSPR page documents 144.490 MHz as the preferred 2 meter WSPR frequency in 2008.Joe Taylor K1JT mentions 2 meter WSPR activity in the Pacific Northwest as early as April 2008 when the WSPR program was first released. WSPR activity has occurred on 2 meters since the inception of WSPR and will continue into the future.Here are a few points to consider in resolving the issue of ARISS voice operations in the 2 meter WSPR frequency segment outside of IARU Region 1: Would really like worldwide coordination but, unfortunately, theįracture in current IARU "standards" seems to indicate that this It's possible that 144.300 and 432.300 might be candidates. In the US some of these bandsĪlready have a beacon sub-allocation. The quieting phenomenon of FM, interference might not have beenĢ) For the longer term, work to get consensus for a newĪll-IARU-region WSPR frequency for, first 2M and then other Western US WSPR database to determine if someone might have been In yourexample, we should be looking at the entire Inadvertently hearing us not the location of the ground station Since this isĪn uplink frequency, we are concerned about the ISS Periods here on the group forum well in advance. It would seem to me that a prudent course of action for those ofġ) Get and maintain an accurate schedule for ARISS operationsĪnd, suspend all of our 144.4895 transmissions during those veryīrief periods when the ISS ground location is within, say, 2000 I don't want us to be a problem but I'd I'd hate to see 2 m and up WSPR investigations stop because we can't find a 200 Hz wide window to use! Perhaps some of the other members of this group in IARU region 1 might be able to give us some insight into 2m frequencies and beaconing. We would really like worldwide coordination but, unfortunately, the fracture in current IARU "standards" seems to indicate that this may be a problem. In the US some of these bands already have a beacon sub-allocation. Due to the quieting phenomenon of FM, interference might not have been recognized as such.Ģ) For the longer term, work to get consensus for a new all-IARU-region WSPR frequency for, first 2M and then other VHF-microwave bands as well. In yourexample, we should be looking at the entire western US WSPR database to determine if someone might have been transmitting during the interval. Since this is an uplink frequency, we are concerned about the ISS inadvertently hearing us not the location of the ground station in QSO. We could announce non-operation periods here on the group forum well in advance. It would seem to me that a prudent course of action for those of us on 2M WSPR would be:ġ) Get and maintain an accurate schedule for ARISS operations and, suspend all of our 144.4895 transmissions during those very brief periods when the ISS ground location is within, say, 2000 miles of our transmitters. I can believe that ARISS had a hard time getting worldwide acceptance of a frequency scheme. While IARU region 1 terrestrial spots with IARU regions 2 &3 might be unlikely, they shouldn't be ruled out, nor should the potential for EME and other non-terrestrial propagation mechanisms.Īt the core of the problem seems to be the fractured nature of the IARU bandplan - where it exists. OTOH, we very much would like to have 2m WSPR operations on the same frequency worldwide. I believe none of us wants to cause QRM to ARISS operations. It seems to me that the *potential* for a problem does exist.
#Jt65 frequencies vhf download#
X Window System (X11), Win32 (MS Windows)įree download Web app or web tool WSJT from RedcoolMedia.Thanks for your work digging into this. For installable end-user packages please go to the WSJT web site at the link below.
#Jt65 frequencies vhf code#
Source code is maintained here SourceForge. WSPR-X: Experimental version of WSPR, including the slow mode WSPR-15. WSPR: Probe potential propagation paths using low-power transmissions. Implements a panoramic, polarization-matching receiver for JT65. MAP65: For EME an VHF and higher frequencies. Optimized for meteor scanner, ionospheric scatter, and EME at VHF/UHF/Microwaves. WSJT: Modes JTMS, FSK441, ISCAT, JT6M, JT65, JT4, Echo, CW. Typical applications include meteor scatter, EME ("moonbounce"), and QRP communication at HF. Download this app named WSJT.The WSJT project currently includes five programs designed for amateur radio communication using state of the art digital techniques.