Hello everybody. As I'm new here, maybe someone can help or direct me to other resources that will assist in my investigation. I am looking for information that can help me select the proper radio frequency for use in a new project. The following is an overview of the project and the inherent needs. I am tasked with developing a system to very accurately track (+/- 1" resolution) a relatively slow moving object 100ft/sec or less) in a crowded human environment from a distance of approximately 500ft. The object is small, requiring a miniature transmitter and thus the battery power source must be very small as well. The power source needs to be rechargeable through magnetic induction as it is embedded in the object. Battery life needs to be 10 minutes. The system needs to be robust and highly resistant to impacts. It would be greatly appreciated if anyone can provide some suggestions on possible radio wavelengths suitable for use in this environment with the limiting physical parameters of the object. Thanks for your thoughts on the topic.