160 CHAPTER 23 Discovery of Global Positioning System Evidence 23.2.2 Language for getting information from a manufacturer about a device If there are questions about the way a device functions, then the only real source is going to be the manufacturer of the device itself. The following language addresses getting device-specific information from a manufacturer. 23.2 1. This is a request for specific information about a GPS device manufactured by your company, specifically the device identified as Make, Model Number, Series Name, Serial Number, and Software Version. 2. Requested information to include specific details about the method of storage of data on the device, including but not limited to: a. How internal data is saved to the device b. How track logs are named c. What happens when new tracks are added to the device d. Whether or not date and time information is stored for track points, and when and if date and time information for individual track points is maintained or deleted e. How waypoints are handled when the user saves a waypoint using the menu for the current location and whether or not the waypoint receives an automatic time stamp f. How often track points are recorded in seconds g. How many track points are allowed in a track log before automatic rollover or creation of a new track log h. The maximum number of track points the device is capable of storing 3. Requested information to include hardware-specific information about the device, specifically but not limited to: a. The number of antennas in the device b. The power and signal ratings of the antennas on the device and the effect of same on the ability of the device to receive signals in normal conditions, overcast conditions, and in urban and rural settings c. The specified range of the device for receiving satellite signals for the purpose of geolocation, in meters or miles d. Any information regarding the ability of the device to receive assisted location services (ALS), including the type of ALS services, the accuracy enhancement of such services, and the conditions under which such services would be used by the device to assist in pinpointing its location e. Information about the specified engineered accuracy of the device as configured, including its specified accuracy rating for geolocation f. Any known conditions inherent to the device that can cause the device to incorrectly record its current location g. The method used to calculate velocity and direction h. Whether or not the unit has an internal compass 4. Information related to any known maintenance issues, failure rates, or software bugs in the device as specified herein.