... of node 17 is N[17] = {17, 18, 19, 20}, and the closed neighbor set of node 18 is N[ 18] = {16, 17, 18, 19, 20}. Apparently, N[17]ʕ N[ 18] . Also the ID of node 17 isless than the ID of node 18, ... the orbits have the samealtitude and inclination, their relative positions change so often that intersatellite links473 Handbook of Wireless Networks and Mobile Computing, Edited by Ivan Stojmenovic´Copyright ... N(16) = {8, 14, 15, 18} , and therefore, N(14) ʜ N(16) = {7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18. Apparently, N (8) ʕN(14) ʜ N(16). The ID of node 8 is the smallest among nodes 8, 14, and 16....