[OZAPRS] HF APRS
Rob
rob.thirkettle at canterbury.ac.nz
Sun Mar 29 07:15:51 EST 2009
Hi All been looking at the IPS web site
http://www.ips.gov.au/HF_Systems/1/1/2 for a ZL VK HF system I think we
would be better on 14 MHz if you look at what band gives the most
propagation and assuming most mobile stations are on the move during day
light hours. This band also is better for HF data reception introducing less
phase distortion to the received signal.
What we need is a VK6 station a VK4/3 and a ZL one 3 gateways would give us
good coverage and if we have 3 more in the same area on 7MHz then we will
have close to 90% coverage. You need to remember this is not a static
situation and as the Sun spot numbers increase we need to move the
frequencies up
Regards Rob ZL3RX
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