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                        <gmd:LocalisedCharacterString locale="#EN">Tide Gauge Stations Network – Observations</gmd:LocalisedCharacterString>
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            <gco:CharacterString>Este conjunto de dados geográficos (CDG) contém a localização geográfica das estações maregráficas ativas e históricas do Instituto Hidrográfico, assim como as respetivas observações da altura da superfície do mar (sea surface height - SSH) em tempo-quase-real (near-real-time - NRT).

As observações de SSH (http://vocab.nerc.ac.uk/collection/P07/current/CF15N1/) encontram-se em Tempo Universal Coordenado (UTC, ISO 8601), referidas ao Zero Hidrográfico (ZH, EPSG:10349). Os códigos de controlo de qualidade (QC) encontram-se em conformidade com o vocabulário https://vocab.nerc.ac.uk/collection/L20/current/.

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Estações maregráficas ativas:
- tide_obs_stations_nrt

Dados disponíveis:
- tide_obs_data_nrt_l1 - Dados em NRT, sem QC (L1), amostragem de 10 ou 60 segundos, latência de 1 minuto e janela temporal móvel de 8 dias
- tide_obs_data_nrt_l2 - Dados em NRT, com QC automático (L2), amostragem de 5 minutos, latência de 1 dia e janela temporal móvel de 15 dias

Estações maregráficas históricas:
- tide_obs_stations_hist


Para aceder às séries completa de observações, ou a períodos passados específicos, deve ser enviado um pedido para cedencia.dados@hidrografico.pt

Este conjunto de dados integra os Conjuntos de Dados de Elevado Valor/HVD identificados de acordo com o Regulamento de Execução n.º 2023/138 da Diretiva (UE) 2019/1024, relativa aos dados abertos e à reutilização de informações do setor público.

Citação:
Instituto Hidrográfico (2025): Rede de estações maregráficas ativas - Observações. https://doi.org/10.71683/107bf4e8-ca3e-4bb7-9439-b99f631eee57</gco:CharacterString>
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                  <gmd:LocalisedCharacterString locale="#PT">Este conjunto de dados geográficos (CDG) contém a localização geográfica das estações maregráficas ativas e históricas do Instituto Hidrográfico, assim como as respetivas observações da altura da superfície do mar (sea surface height - SSH) em tempo-quase-real (near-real-time - NRT).

As observações de SSH (http://vocab.nerc.ac.uk/collection/P07/current/CF15N1/) encontram-se em Tempo Universal Coordenado (UTC, ISO 8601), referidas ao Zero Hidrográfico (ZH, EPSG:10349). Os códigos de controlo de qualidade (QC) encontram-se em conformidade com o vocabulário https://vocab.nerc.ac.uk/collection/L20/current/.

Os níveis de processamento seguem uma convenção interna. O nível L1 corresponde a dados sem QC. O nível L2 corresponde a dados com QC automático (e.g., testes de gama, deteção de picos e consistência temporal).

Estações maregráficas ativas:
- tide_obs_stations_nrt

Dados disponíveis:
- tide_obs_data_nrt_l1 - Dados em NRT, sem QC (L1), amostragem de 10 ou 60 segundos, latência de 1 minuto e janela temporal móvel de 8 dias
- tide_obs_data_nrt_l2 - Dados em NRT, com QC automático (L2), amostragem de 5 minutos, latência de 1 dia e janela temporal móvel de 15 dias

Estações maregráficas históricas:
- tide_obs_stations_hist


Para aceder às séries completa de observações, ou a períodos passados específicos, deve ser enviado um pedido para cedencia.dados@hidrografico.pt

Este conjunto de dados integra os Conjuntos de Dados de Elevado Valor/HVD identificados de acordo com o Regulamento de Execução n.º 2023/138 da Diretiva (UE) 2019/1024, relativa aos dados abertos e à reutilização de informações do setor público.

Citação:
Instituto Hidrográfico (2025): Rede de estações maregráficas ativas - Observações. https://doi.org/10.71683/107bf4e8-ca3e-4bb7-9439-b99f631eee57</gmd:LocalisedCharacterString>
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                  <gmd:LocalisedCharacterString locale="#EN">This Geographic Dataset (GD) contains the geographic locations of the active and historical tide gauge stations operated by the Portuguese Hydrographic Institute, as well as their near-real-time (NRT) sea surface height (SSH) observations.

The SSH observations (http://vocab.nerc.ac.uk/collection/P07/current/CF15N1/) are provided in Coordinated Universal Time (UTC, ISO 8601) and are referenced to the Hydrographic Zero (ZH, EPSG:10349). Quality control (QC) flags comply with the vocabulary available at https://vocab.nerc.ac.uk/collection/L20/current/.

The processing levels follow an internal convention. Level L1 corresponds to data without quality control (QC). Level L2 corresponds to data that have undergone automatic QC (e.g., range checks, spike detection, and temporal consistency tests).

Active tide gauge stations:

tide_obs_stations_nrt

Available datasets:

tide_obs_data_nrt_l1 – Near-real-time (NRT) data without QC (L1), sampled every 10 or 60 seconds, with a latency of 1 minute and a rolling time window of 8 days.
tide_obs_data_nrt_l2 – Near-real-time (NRT) data with automatic QC (L2), sampled every 5 minutes, with a latency of 1 day and a rolling time window of 15 days.

Historical tide gauge stations:

tide_obs_stations_hist

To access the complete observation time series, or specific historical periods, a request should be sent to cedencia.dados@hidrografico.pt.

This dataset is part of the High-Value Datasets (HVD) identified under Implementing Regulation (EU) 2023/138 of Directive (EU) 2019/1024 on open data and the reuse of public sector information.

Citation:
Instituto Hidrográfico (2026): Rede de estações maregráficas  - Observações. https://doi.org/10.71683/107bf4e8-ca3e-4bb7-9439-b99f631eee57</gmd:LocalisedCharacterString>
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