Hi Tobie, I'm fascinated, why do you have a little boat roaming around the middle of the atlantic ocean? Do you do this often? :o) -Roman Tobie Horswill wrote: > > Hi, > > I know close to nothing regarding wireless transmission such as radio, > packet, satellite and the like but I was wondering if there would be an > economic way for an autonomous vehicle to send it's position back home ? The > vehicle is a solar powered boat already equipped with a GPS receiver used > for navigation and it would be a piece of cake to add a daily routine to the > PIC for uploading this information to some RF stage. Here is the catch : the > boat can be anywhere in the middle of the Atlantic ocean and obviously has > very little power available (in fact barely enough to keep it moving). The > boat could stop while it transmits to save power and wait for it's batteries > to recharge before going on, that's not a problem. The required bandwidth is > minimal and only a few bytes would be sent daily. The received data would be > used to update the boat's daily position on a Web site. At this point, I'm > only looking for one-way transmission, nothing would get sent back to the > boat even though that would be cool ... > > I was thinking of something like the transmiters they put in Tuna fish > to track their migration habits. Any idea who makes these things and how > they work ? Is direct ground to ground transmission possible accross the > Atlantic with such little power available ? Is satellite the only way to go > ? > > Thanks, > > Tobie Horswill > Ex Machina, Quibec (Quibec) CAN > thorswil@hotmail.com > > -- > http://www.piclist.com hint: PICList Posts must start with ONE topic: > "[PIC]:","[SX]:","[AVR]:" =uP ONLY! "[EE]:","[OT]:" =Other "[BUY]:","[AD]:" =Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: "[PIC]:","[SX]:","[AVR]:" =uP ONLY! "[EE]:","[OT]:" =Other "[BUY]:","[AD]:" =Ads