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Data Quality Reports

To enable their full scientific and operational exploitation, the CryoSat products are routinely monitored for quality. The results of quality control and mission performance monitoring are reported through different means:


Daily Performance Quality Reports

​​​​​Daily reports are generated for all CryoSat product types, but ONLY when an unexpected issue is identified in the products and needs to be reported. The table below indicates specific days where quality checks have identified an unexpected issue in the data products and points users to the relevant daily report where they can find more information.

These daily reports provide an overview of the L1 and L2 product quality, relevant mission/ instrument news, known data gaps and global plots of the data coverage. They provide information about any inconsistencies observed in the data products and any flags raised, including quality flags, tracking flags, measurement confidence flags, correction error flags. Users may wish to use these flags to apply filtering to their dataset.

You can find all the daily reports in QRAS, by applying the active filters: ‘CryoSat’, ‘SIRAL’, ‘Daily’ and ‘Quality Control Report’.

Note to CryoSat Data Users:  Daily Reports only when an issue is identified in the products. If you have any queries about any other days or data products, then please get in touch via eohelp@esa.int. To give us your feedback on the quality information provided and what you need, please fill out our user survey or send your feedback via email .
DateProduct TypeObservationExplanationRelevant Daily Quality Report
12.11.2024NOPAll L1B and L2 NOP products up to 23:58:34 (400 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241112
10.11.2024NOPAll L1B and L2 NOP products up to 00:06:29 11/11/2024 (418 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241110
09.11.2024NOPAll L1B and L2 NOP products up to 00:04:10 10/11/2024 (455 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241109
08.11.2024NOPAll L1B and L2 NOP products up to 00:08:27 09/11/2024 (420 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241108
07.11.2024NOPAll L1B and L2 NOP products up to 00:06:03 08/11/2024 (426 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241107
06.11.2024NOPAll L1B and L2 NOP products up to 00:00:04 07/11/2024 (413 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241106
04.11.2024NOPAll L1B and L2 NOP products up to 23:41:39 (420 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241104
02.11.2024NOPAll L1B and L2 NOP products up to 23:41:39 (366 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241102
31.10.2024NOPAll L1B and L2 NOP products up to 00:03:46 01/11/2024 (419 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241031
29.10.2024NOPAll L1B and L2 NOP products up to 00:05:39 30/10/2024 (390 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241029
27.10.2024NOPAll L1B and L2 NOP products up to 00:07:32 28/10/2024 (407 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241027
25.10.2024NOPAll L1B and L2 NOP products up to 00:09:25 26/10/2024 (425 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241025
23.10.2024NOPAll L1B and L2 NOP products up to 00:11:18 (24/10/2024) (456 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20241023
25.7.2024NOPAll L1B and L2 NOP products up to 11:26:12 (162 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20240725
24.7.2024IOPAll L1B and L2 IOP products from 12:00:00 to 23:24:07 (112 products) are missing the Dynamic Atmospheric Correction.TheForecast AUXI MOG2D files needed to generate this correction were not available in time for processing.CS2_DR_IOP_20240724
11.5.2024IOPAll L1B and L2 IOP products (423 products) are missing the GIM Ionospheric Correction.The Forecast AUX file needed to generate this correction was not available at the time of processing, therefore AUXI file was used instead.CS2_DR_IOP_20240511
6.4.2024IOPAll L1B and L2 IOP products (427 products) are missing the GIM Ionospheric Correction. The Forecast AUX file needed to generate this correction was not available at the time of processing, therefore AUXI file was used instead.CS2_DR_IOP_20240406
22.12.2023IOPAll L1B and L2 IOP products (111 products) up to 23:52:11 are missing the Dynamic Atmospheric Correction. The Forecast AUXI MOG2D files needed to generate this correction were not available in time for processing.CS2_DR_IOP_20231222
15.11.2023NOPAll L1 and L2 NOP products up to 11:26:55 (190 products) are missing the GIM Ionospheric Correction.The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20231115
13.11.2023IOPAll L1B and L2 IOP products (445 products) are missing the GIM Ionospheric Correction. The Forecast AUX file needed to generate this correction was not available at the time of processing, therefore AUXI file was used instead.CS2_DR_IOP_20231113
13.8.2023IOPAll L1B and L2 IOP products from 12:19:48 to 23:53:52 (121 products) are missing the Dynamic Atmospheric Correction.The Forecast AUXI MOG2D files needed to generate this correction were not available in time for processing.CS2_DR_IOP_20230813
20.2.2023NOPAll L1 and L2 NOP products from 00:00:30 to 15:55:01 (128 products) are missing the GIM Ionospheric Correction. The Forecast AUXI file needed to generate this correction was not available at the time of processing.CS2_DR_NOP_20230220
25.1.2023NOPAll L1 and L2 NOP products from 12:03:54 to 16:09:51 (64 products) are missing the Meteo Corrections. The Forecast Meteo AUXI files needed to generate these corrections were not available at the time of processing.CS2_DR_NOP_20230125


Monthly Performance Quality Reports
Monthly (or Cyclic) reports are generated for Offline L1B and L2 ice products and include monthly plots and statistics to provide users with a clear snapshot of SIRAL instrument health, data availability and any changes in key quality parameters. Cyclic reports cover a 30-day reporting period, defined since the beginning of the mission purely for statistic reporting purposes. You can find the reports in QRAS, by applying the active filters: ‘CryoSat’, ‘SIRAL’, ‘Cyclic’ and ‘Quality Control Report’.


Quality Monitoring of Ice Products
Long-term CryoSat performance and ice product quality is monitored by the CryoSat L2 Performance Monitoring service. This service routinely monitors L2 and L2i data products generated operationally. Long-term analysis includes the monitoring of key L2 parameters (e.g. backscatter, freeboard and Sea Surface Height Anomaly), retracker failure statistics and L2 quality flags. Crossover analysis is performed in order to assess the performance of the instrument and the processing chain.


Quality Monitoring of Ocean Products
CryoSat Ocean products are routinely quality-controlled and validated by the UK National Oceanography Centre (NOC). The CryoSat Quality Control and Validation Daily and Monthly reports aim to provide an overview of the quality of CryoSat NRT Ocean (NOP) Products, Intermediate Ocean Products (IOP) and Geophysical Ocean Products (GOP). Fast Delivery Marine (FDM) production was discontinued on 01/02/2021.


Quality Monitoring of Cryo-TEMPO Products
TThe CryoSat ThEMatic PrOducts (Cryo-TEMPO) quality control and validation portal provides monthly thematic product reports, maps and statistical trends of each product's parameters over key areas of interest for each Cryo-TEMPO theme (land ice, sea ice, polar oceans, coastal oceans and inland waters) The Cryo-TEMPO products include fully-traceable discrepancies and use the most up to date processing dedicated to each thematic area. Throughout the project, the products will be constantly updated, and validated by a group of Thematic Users, thus ensuring optimal relevance and impact for the intended target communities. The Cryo-TEMPO quality control portal provides users with easy access to view product parameters and statistics from each Cryo-TEMPO product baseline, as soon as they are available.

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