APRS DX analyse
Door gebruik te maken van de informatie uit het digi-pad is het mogelijk propagatie studies te maken met behulp van APRS.
op de site van http://mountainlake.k12.mn.us/ham/aprs/path.cgi?map=eu vind je een "real time" analyse van de VHF condities.
Ik heb deze informatie van de website gecopieerd:
APRS-IS servers gather information from networks of VHF and HF Amateur Radio packet stations. This information from the packet radio network is gatewayed into the Internet and made available as a constant stream of real-time data from a set of network servers.
Packet radio stations provide two bits of information that are useful for studying propagation. A station's latitude and longitude is typically transmitted with each data packet, pinpointing the transmitter's location. Also included in packet radio transmissions is the path, a list of hops between stations, that a message takes before reaching an Internet gateway.
By saving the location of each station, we can use that information to determine the distance and direction between hops in the packet path. There are a sufficient number of packet radio stations on VHF frequencies in much of Europe and North America (typically on 144.39 MHz) to show real-time propagation over large portions of these continents.
Voor meer informatie kijk je op: http://mountainlake.k12.mn.us/ham/aprs/index.html