10AM to Noon. Random days. CHP on Highway 50, both directions from Sunrise Blvd to Ease Bidwell are using the airplane to pace cars and report down to CHP cars and CHP bikes parked either on the shoulder of the highway or on the shoulder of the onramps to collect revenue for speeders. The airplane reports which lane, car color and type and what speed paced. During this session of revenue collection, they utilize CHP Blue channel 42.340(air to car)/42.180 to communicate to the cars from the air and vice versa. (When the airplane is not being used, they utilize the Stalker Dual radar system on Ka band.)