There are a few local false signals that I pass everyday to use as a benchmark for my RD's. I have noticed that in the morning the range of detection is greater than the afternoon with the only vaiables I have noticed are:
Morning its darker and generally colder.
Traffic volume is about the same at both times.
weekends when traffic is lighter the detection is up slightly but still follows morning/afternoon patterns.
The difference in range is about 150yds.
Anyone have any idea what the cause of this variance could be?