Home->L2I Parameters->Retracker Failure Flag

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L2I Parameters

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Further Info

ESA Cryosat Site

L2I Retracker Failure Flag Monitoring

IPF Baseline:

E D C B A

Phase:

Operational Commissioning

Cryosat L2I data includes a Retracker Failure Flag for each 20Hz measurement record (Baseline A/B:L2I field 48, bit 0 Baseline C: L2I field 75 bits 20,21,22). This indicates the overall success or failure of the retracker algorithm for that measurement waveform.

This tool provides statistics of retracker failure and global and polar plots of the Retracker Failure Flag for each 30-day data take and SIRAL mode.

View Retracker Failure Trend for each mode.

Data take	Timespan	% LRM failed CFI	% LRM failed LIRT	% LRM failed OCOG	% SAR failed	% SARIN failed	Global Map	North Polar	South Polar
190	27/4/26 -> 26/5/26	17.47	14.22	04.55	02.44	05.77	View	View	View
189	28/3/26 -> 26/4/26	17.03	13.96	04.64	02.29	06.10	View	View	View
188	26/2/26 -> 27/3/26	16.38	13.50	04.73	02.07	06.39	View	View	View
187	27/1/26 -> 25/2/26	16.17	13.34	04.77	01.92	06.40	View	View	View
186	28/12/25 -> 26/1/26	16.71	13.71	04.72	01.63	06.32	View	View	View
185	28/11/25 -> 27/12/25	17.27	14.18	04.56	01.62	05.90	View	View	View
184	29/10/25 -> 27/11/25	18.12	14.87	04.43	01.73	05.70	View	View	View
183	29/9/25 -> 28/10/25	18.42	15.12	04.39	01.85	05.53	View	View	View
182	30/8/25 -> 28/9/25	18.74	15.41	04.55	01.65	05.12	View	View	View
181	31/7/25 -> 29/8/25	18.64	15.37	04.41	01.73	04.94	View	View	View
180	1/7/25 -> 30/7/25	18.60	15.29	04.50	01.07	04.88	View	View	View
179	1/6/25 -> 30/6/25	18.23	14.98	04.58	01.54	05.06	View	View	View
178	2/5/25 -> 31/5/25	17.80	14.53	04.58	02.00	05.57	View	View	View
177	2/4/25 -> 1/5/25	17.10	13.99	04.65	02.08	06.11	View	View	View
176	3/3/25 -> 1/4/25	16.36	13.48	04.62	01.97	06.27	View	View	View
175	1/2/25 -> 2/3/25	16.15	13.36	04.74	01.75	06.38	View	View	View
174	2/1/25 -> 31/1/25	16.53	13.63	04.67	01.61	06.54	View	View	View
173	3/12/24 -> 1/1/25	17.04	13.99	04.55	01.60	06.29	View	View	View
172	3/11/24 -> 2/12/24	18.12	14.94	04.48	01.51	05.92	View	View	View
171	4/10/24 -> 2/11/24	18.46	15.24	04.39	01.57	05.43	View	View	View
170	4/9/24 -> 3/10/24	18.76	15.51	04.55	01.45	05.26	View	View	View
169	5/8/24 -> 3/9/24	18.83	15.55	04.49	01.29	05.05	View	View	View
168	6/7/24 -> 4/8/24	18.67	15.34	04.45	01.07	04.97	View	View	View
167	6/6/24 -> 5/7/24	18.31	15.04	04.52	01.15	04.93	View	View	View
166	7/5/24 -> 5/6/24	17.90	14.62	04.58	02.19	05.44	View	View	View
165	7/4/24 -> 6/5/24	17.22	14.09	04.64	02.27	06.17	View	View	View
164	8/3/24 -> 6/4/24	16.37	13.50	04.69	02.04	06.37	View	View	View
163	7/2/24 -> 7/3/24	16.09	13.32	04.71	01.83	06.44	View	View	View
162	8/1/24 -> 6/2/24	16.24	13.42	04.67	01.64	06.39	View	View	View
161	9/12/23 -> 7/1/24	16.82	13.83	04.61	01.56	06.36	View	View	View
160	9/11/23 -> 8/12/23	17.88	14.73	04.55	01.50	06.13	View	View	View
159	10/10/23 -> 8/11/23	18.41	15.21	04.55	01.58	05.49	View	View	View
158	10/9/23 -> 9/10/23	18.87	15.60	04.66	01.57	04.87	View	View	View
157	11/8/23 -> 9/9/23	18.95	15.70	04.56	01.41	04.76	View	View	View
156	12/7/23 -> 10/8/23	18.70	15.49	04.45	01.26	04.82	View	View	View
155	12/6/23 -> 11/7/23	18.58	15.33	04.57	01.44	04.77	View	View	View
154	13/5/23 -> 11/6/23	18.03	14.87	04.58	02.27	05.33	View	View	View
153	13/4/23 -> 12/5/23	17.50	14.39	04.75	02.48	06.01	View	View	View
152	14/3/23 -> 12/4/23	16.71	13.80	04.87	02.36	06.80	View	View	View
151	12/2/23 -> 13/3/23	16.17	13.38	04.87	02.06	06.82	View	View	View
150	13/1/23 -> 11/2/23	16.54	13.67	04.87	02.00	06.75	View	View	View
149	14/12/22 -> 12/1/23	16.89	13.88	04.77	01.76	06.78	View	View	View
148	14/11/22 -> 13/12/22	18.05	14.88	04.66	01.57	06.50	View	View	View
147	15/10/22 -> 13/11/22	18.48	15.24	04.49	01.59	06.13	View	View	View
146	15/9/22 -> 14/10/22	18.89	15.61	04.65	01.51	05.59	View	View	View
145	16/8/22 -> 14/9/22	18.84	15.55	04.64	01.34	05.51	View	View	View
144	17/7/22 -> 15/8/22	18.79	15.54	04.58	01.25	05.34	View	View	View
143	17/6/22 -> 16/7/22	18.53	15.32	04.60	01.27	05.31	View	View	View
142	18/5/22 -> 16/6/22	18.17	15.03	04.68	02.05	05.41	View	View	View
141	18/4/22 -> 17/5/22	17.69	14.56	04.73	02.43	06.02	View	View	View
140	19/3/22 -> 17/4/22	16.58	13.81	04.79	02.37	06.65	View	View	View
139	17/2/22 -> 18/3/22	16.29	13.58	04.87	02.22	06.87	View	View	View
138	18/1/22 -> 16/2/22	16.43	13.61	04.81	02.00	06.83	View	View	View
137	19/12/21 -> 17/1/22	16.81	13.85	04.82	01.70	06.75	View	View	View
136	19/11/21 -> 18/12/21	17.74	14.66	04.71	01.50	06.44	View	View	View
135	20/10/21 -> 18/11/21	18.49	15.31	04.56	01.66	06.19	View	View	View
134	20/9/21 -> 19/10/21	18.70	15.47	04.57	01.54	05.84	View	View	View
133	21/8/21 -> 19/9/21	18.83	15.50	04.66	01.42	05.60	View	View	View

©UCL 2011, Mullard Space Science Laboratory