A ground location inertial navigation geopositioning system (GROUNDLINGS) end receiver (GER) can include a GROUNDLINGS module. The GROUNDLINGS module can be configured to generate a GER position using a time of flight (TOF) of a downlink pseudo-random noise (PRN) signal and a Doppler shift of at least one of the downlink PRN signal and a downlink tone signal on a common frequency carrier. The downlink PRN signal sent from a GROUNDLINGS satellite (GRS) to the GER can include a copy of an uplink PRN signal from a ground located transceiver (GLT) to the GRS. When used, the downlink tone signal can be received from the GRS.