Table 1. Alias Periods (Diagonal) and Alias Synodic Periods (Off Diagonal) for TOPEX (Jason) and Envisat (ERS-2/Envisat), Respectivelya


	M2	S2	N2	K2	K1	O1	P1	Q1	Ssa	Sa

TOPEX/POSEIDON (Jason 1 and Jason 2)
M2	62	1084	245	220	97	173	206	594	94	75
S2		-59	316	183	89	206	173	384	87	70
N2			-50	116	69	594	112	173	68	57
K2				-87	173	97	3355	349	165	114
K1					-173	62	183	116	3355	329
O1						46	94	134	61	52
P1							-89	316	173	118
Q1								-69	112	86
Ssa									183	365
Sa										365

Envisat (ERS-2)
M2	-95	95	3169	196	128	365	128	328	196	128
S2		∞	97	183	365	75	365	133	183	365
N2			97	209	133	328	133	365	209	133
K2				183	365	127	365	487	∞	365
K1					365	95	∞	209	365	∞
O1						-75	95	173	128	95
P1							-365	209	365	∞
Q1								133	487	209
Ssa									183	365
Sa										365

aThe alias periods are given in days and the "problematic" alias periods for altimetric tide retrieval are shown in bold.