Re: DST Communications tools
Hi Mark and DST group.
Thanks for the AREDN-mesh map. I saw many available nodes in the flat L.A. basin and others down south to San Clemente.
Further South it gets sparse. I like the idea of establishing nodes in High Schools which maybe used as shelters during disasters. Just how was this accomplished ? How was it funded? How were school districts convinced that AREDN would be beneficial to them?
For San Diego, schools - most used during disasters by the Red Cross - are located in the back country in "radio holes" just how could AREDN work there? Red Cross never knows which H.S. will be used as this is determined by conditions on the ground. It would take many relay nodes for AREDN to be able to reach these locations. Would it take many portable mobiles with their "Go-Kits" to drive to high locations and on the top of valleys to relay the AREDN microwave signals, down to the schools in these radio holes? Could these high locations be even accessed during a disaster? To establish and maintain these many portable AREDN nodes, would require that the operators stay at these locations, for the duration of the disaster event, or equipment could be stolen. .
As I have mentioned, there is a large pool of AREDN talent in the L.A. area. There is also the subject of what I call "Critical Mass" that has been reached in the L.A. area - that is: many active AREDN nodes attract more nodes and users. In San Diego, we are way below "Critical Mass" which has the effect of turning off new participants. The thought is, "if there are no usable AREDN signals available on my roof why should I spend the money in setting this up?" Also how can I learn how to use AREDN with no means of connecting to it? True, I could purchase AREDN equipment as a "Go-Kit" to deploy, then all we would need is hundreds more to make a usable Mesh network!
During the 2003, 2007, wildfires in San Diego County, There were multiple shelter's set up (in radio holes) and then the fire changed directions and what was a safe shelter was now threatened, and the shelter occupants had to be moved, to another H.S. (in a radio hole). Also animal rescue for horses, goat's to Dogs were sent to the Del Mar Fair grounds (another radio hole) that needed communications. I also remember the wild fires burning underneath the H.V. power lines depositing soot on the insulators causing flash overs!! So the "Sun-link" line from the East and the "Path 15" from the North had to be shut down! This left San Diego with not enough power to meet basic needs! I was in the County EOC that was fully staffed with many in front of laptop computers "working" the disaster - WHEN THE LIGHTS WENT OUT"!!! Every thing that was not saved went "poof" and the 911 Sheriff Dispatch on the second floor went down as well. We were supposed to have the highest priority for power, yet the place went dark!! There was a collective "gasp" in the room. It seemed to be a very long time before the diesel generators in the basement fired up - filling the EOC with Diesel fumes.
So I ask this question, during the events mentioned above, how would have AREDN met the communications needs??!!
Using the AREDN-Mesh Map, I noticed that some nodes were on 3.4 GC - is not the FCC taking that away from the Amateur service? I scrolled down to my area and I found a station "K6MRW" in the Scripps Ranch area SE of me in Mira Mesa. I noted he is on 2.4GC which has MANY users = high noise floor. Also "tunnel installed" = false. I thought that perhaps this station could provide me a way to connect to AREDN. I looked this station up on the FCC data base, and drove to the station location. Driving out, I went up-up-up the hill past the Miramar Reservoir. I thought this location above the lake would be perfect and there would be no trees in the way! But alas, as I continued my course to the address, I had to travel down-down-down into a deep radio hole surrounded by a thick stand of trees. I drove to the address and found "K6MRW" lives in an HOA "Thou-Shalt-Not zone" - antenna location. I saw no antennas on the house. K6MRW lives only 5 miles from my house, yet it is a no-go. So that leaves me again with no way to connect to AREDN.
Again I see P2P VARA on HF or VHF much more usable.(no gateways needed!)
/8/2021 8:36 AM, Mark Warrick (KM6ZPO) wrote: