If at the end of the timing cycle no other events have been detected the multiple switching means 27 and 28 will return to the normal operating mode. If another event is detected prior to the end of the timing cycle that cycle will be restarted from the beginning. At this point the timer begins a predetermined timing cycle. The green LED is turned off and the red LED is turned on. The multiple switching means move to the protected state in which the connected equipment conductors are disconnected from the line side power and signal conductors and the load side conductors are connected to the chassis ground. At this point a signal is sent from the thunder detector circuitry 22 to the timer circuitry 23 which opens the circuit to the multiple switching means 27 and 28. If a reasonable match is detected the assumption is made that there is a lightning storm close enough to the area to present a potentially dangerous condition to the connected equipment 12.
While in this mode the thunder detection means 22 is constantly sampling for audible sounds and comparing those sound patterns to other patterns which are stored in it's memory. In this state the connected equipment 12 is protected from surges by the surge suppression circuitry. In this mode the timer cycle is not yet activated and the normally closed contacts within allow current to energize the coil of the multi switching means 27 and 28 which allow power and signal to the connected equipment 12. This in turn allows AC power to the power supply and DC power to the thunder detector 22, the timer 23 and the green LED 29. In building off of the results and lessons learned from SpaceNet 1, CosmiQ and the SpaceNet Partners decided to launch a second public data science challenge focused again on automated building footprint. With switch S 1 in the “NORMAL” position contact “S 1-a” is closed thus energizing the coil of CR 1 25. SpaceNet 2: Building footprint detection in geographically diverse settings.
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