A Branch and Bound Algorithm for Agile Earth Observation Satellite Scheduling

Table 2

The time costs of different algorithms.

Number of targets	Average time cost				Maximum time cost
	NonPrune	NonIntial	NonUpdate	TDTCBB	NonPrune	NonInt	NonUpdate	TDTCBB
30	509.13	11.09	8.09	7.57	1529.64	23.67	22.31	22.26
31	1035.66	10.17	6.02	5.82	6856.14	20.38	14.48	13.19
32	1388.77	16.96	7.89	7.21	5212.03	25.59	17.12	13.65
33	879.92	16.77	11.04	9.53	1796.53	32.07	27.22	22.58
34	963.38	19.89	10.73	10.06	4515.09	47.50	26.71	21.62
35	6244.71	42.94	24.32	22.78	31498.4	157.88	63.27	56.17
36	—	41.69	23.85	22.35	—	98.36	54.02	44.21
37	—	28.37	20.18	15.01	—	43.52	57.85	23.92
38	—	33.26	18.92	18.55	—	44.95	34.48	30.50
39	—	47.54	19.16	19.10	—	117.78	50.05	49.90
40	—	55.58	26.14	22.41	—	95.87	52.14	44.07
41	—	58.15	36.96	31.23	—	124.96	91.81	66.03
42	—	104.20	60.50	54.53	—	331.95	179.80	152.06
43	—	95.43	33.39	32.31	—	150.99	46.79	45.63
44	—	84.07	33.05	31.58	—	133.42	58.17	58.13
45	—	275.32	107.78	106.79	—	1423.46	565.39	538.09
46	—	136.24	59.92	52.38	—	397.62	191.27	185.32
47	—	146.85	43.02	40.44	—	384.70	73.44	72.85
48	—	110.02	41.82	40.58	—	326.78	63.88	61.91
49	—	162.07	60.65	51.04	—	564.89	121.81	90.99
50	—	204.68	84.44	69.05	—	370.86	172.90	135.38
51	—	228.01	128.46	110.05	—	702.79	382.00	389.69
52	—	357.41	188.84	163.81	—	617.71	659.73	587.63
53	—	443.14	189.53	147.82	—	1005.12	898.90	495.71
54	—	503.18	168.74	149.32	—	1740.40	446.83	440.71
55	—	364.66	141.32	114.38	—	975.19	386.53	253.74