Table 1 Locations for experiments when \(M=2\) and \(N=5\) (also the Table 1 in34).

From: A homotopy estimation based temporal-spatial spectrum prediction for UAV communications with arbitrary flight paths

Locations (Chengdu, Sichuan, China)

\(d_{n,1}\) (km)

\(L_1^{\text {kn}} \;\): Chengdu Shuangliu International Airport

0

\(L_1^{\text {ukn}}\): Sichuan University (Jiangan)

4.57

\(L_2^{\text {ukn}}\): Sichuan Aihua College

9.68

\(L_3^{\text {ukn}}\): Chengdu University of information Technology (Qingyang)

13.75

\(L_4^{\text {ukn}}\): Southwestern University of Finance and Economics (Liulin)

18.27

\(L_5^{\text {ukn}}\): Xihua University

23.18

\(L_2^{\text {kn}}\;\): Chengdu Technological University

25.46