Detecting system, detecting apparatus, detecting method, and program

A detecting system comprising:

• a tag;
• a radar device, comprising one or more processors, configured to transmit transmission radio waves to the tag and to acquire reception radio waves produced by the transmission radio waves being reflected by the tag;
• and
• a detecting apparatus connected to the radar device, wherein
• the tag includes
• a pattern made of a plurality of materials that reflect or scatter radio waves received from the radar device, the pattern including a known pattern known to the detecting apparatus and an unknown pattern unknown to the detecting apparatus,
• the detecting apparatus includes
• a specifying unit, comprising one or more processors, configured to calculate a relative velocity between the radar device and the tag, with which the known pattern can be detected from the reception radio waves, and to specify a condition for the radar device to transmit transmission radio waves for estimating the unknown pattern, from the calculated relative velocity, and
• a notification unit, comprising one or more processors, configured to notify the radar device of the specified condition, and
• the radar device transmits the transmission radio waves to the tag under the condition.