| CPC G01S 5/0249 (2020.05) [G01S 5/14 (2013.01); H04B 7/18513 (2013.01); H04W 64/00 (2013.01)] | 20 Claims |

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1. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code, the at least one memory and computer program code being configured to, with the at least one processor, cause the apparatus to:
receive an indication of propagation delay between a terrestrial network node and a non-terrestrial node in a non-terrestrial wireless communication network;
receive an indication of location of the non-terrestrial node;
evaluate location of the terrestrial network node in dependence upon the received indication of propagation delay between the terrestrial network node and the non-terrestrial node, and the indication of location of the non-terrestrial node,
wherein the terrestrial network node comprises: a non-terrestrial network gateway which is coupled to a network base station remote from the non-terrestrial network gateway and wherein the apparatus is further caused to:
determine a signal delay between the network base station and the non-terrestrial network gateway.
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