In order to both support operations during the COVID-19 shelter-at-home directive, and to help plan how to
optimize future communications activities, during the four weeks from March March 23 through April 13, 2020, Mountain View
ARES/RACES staff conducted a test of our ability to hear each other from our home locations during our
regular monday night check-in nets.
What We Did: during check-ins, participating operators recorded how well they could hear the others who were checking
in using a simple coding scheme:
These reception reports were entered into an online form at the end of each net. The form also asked for information
about each participant's radio and antenna.
- Good reception
- Poor reception
- Unintelligable, or no signal heard
How We Analyzed the Data: Leslie (KK6EKN) and Micky (KK6EEI) merged these datasets and produced
some charts analyzing the results. Forrest (AJ6JN) wrote a program that converted the data into a set of maps for
each operator showing how well others could hear them, and how well they could hear others. These maps
can be viewed at k6mtv.org/surveymaps.
How to Read the Maps: There are two types of maps at k6mtv.org/surveymaps:
transmit maps (how well other operators heard a single
person transmitting) and receiver maps (how well one person heard everyone else). There is one transmit map, named
callsign-xmit-map.png, for each person who checked in during at least one of the four study weeks, and one receiver
callsign-rcvr-map.png, for each person who submitted a reception form for one of the four study weeks.
If a participant informed us that they changed their equipment or location from one week to another, they will have
multiple transmit or receiver maps, one for each equipment/location. Those participants will have a dash and week
numbers after their callsigns to indicate which week's equipment is being refered to. For example:
The background for all maps consists of the City of Mountain View, with CERT neighborhood boundaries indicated.
The icons indicate:
AE6EO-1-xmit-map.png uses AE6EO's location and equipment during survey week 1
KM6EEI-34-xmit-map.png uses KM6EEI's location and equipment during survey weeks 3 and 4
- Blue radio: the transmitter on transmit maps, and the receiver on receiver maps.
- Green person: Good reception reported
- Yellow person: Poor reception reported
- Red person: Unintelligible, or no signal reported