The Sentinel - 1 radar imaging mission is composed of a constellation of two polar-orbiting satellites providing continous all-weather, day and night imagery for Land and Maritime Monitoring. C-band synthentic aperture radar imaging has the advantage of operating at wavelenghts that are not obstructed by clouds or lack of illumination and therefore can acquire data during day or night under all weather conditions. With 6 days repeat cycle on the entire world and daily acquistions of sea ice zones and Europe's major shipping routes, Sentinel-1 ensures reliable data availability to support emergency services and applications requiring time series observations. Sentinel-1 continues the retired ERS and ENVISAT missions. Level 1 GRD products are available since October 2014.

Sentinel-1 is a pair of European radar imaging (SAR) satellites launched in 2014 and 2016. Its 6 days revisit cycle and ability to observe through clouds makes it perfect for sea and land monitoring, emergency response due to environmental disasters, and economic applications. This dataset represents the global Sentinel-1 GRD archive, from beginning to the present, converted to cloud-optimized GeoTIFF format.

SpatioTemporal Asset Catalog (STAC) Item - S1A_IW_GRDH_1SDV_20250412T232045_20250412T232110_058730_07463E_8264_COG in sentinel-1-grd

Level-1 Ground Range Detected (GRD) products consist of focused SAR data that has been detected, multi-looked and projected to ground range using the Earth ellipsoid model WGS84. The ellipsoid projection of the GRD products is corrected using the terrain height specified in the product general annotation. The terrain height used varies in azimuth and it is constant in range (For IW/EW modes only the terrain height of first subswath is considered)

SpatioTemporal Asset Catalog (STAC) Item - S1A_EW_GRDM_1SDH_20250612T072301_20250612T072401_059610_07669C_A2E1_COG in sentinel-1-grd

This dataset contains Extra Wide swath (EW) Ground Range Detected (GRD) Medium Resolution (MR) C-band Synthetic Aperture Radar (SAR) data from the European Space Agency (ESA) Sentinel 1B satellite. Sentinel 1A was launched on 25th April 2016 and provides continuous all-weather, day and night imaging radar data. The EW mode is primarily used for wide-area coastal monitoring. The EW mode supports single (HH or VV) and dual (HH+HV or VV+VH) polarisation. These data are available via CEDA to any registered user in the UK.

The Sentinel-1C satellite was launched December 5, 2024. Sentinel-1C is the the latest satellite to be added to the Sentinel-1 constellation. The Sentinel-1 satellites (Sentinel-1A, Sentinel-1B, and Sentinel-1C) are sun-synchronous polar-orbiting satellites that operate day and night performing C-band synthetic aperture radar (SAR) imaging. The Sentinel-1 satellites operate in four imaging modes with different resolutions (down to 5 meters) and coverage (up to 400 kilometers). The Sentinel-1 satellites provide dual polarization capability and short revisit times.

Sentinel-1C Ground Range Detected (GRD) products consist of focused SAR data that has been detected, multi-looked and projected to ground range using the Earth ellipsoid model WGS84. The ellipsoid projection of the GRD products is corrected using the terrain height and is specified in the product’s general annotation. The terrain height used varies in azimuth and it is constant in range (only the terrain height of first subswath is considered for Interferometric Wide (IW) and Extra Wide (EW) swath modes).

Ground range coordinates are the slant range coordinates projected onto the ellipsoid of the Earth. Pixel values represent detected amplitude. Phase information is lost. The resulting product has approximately square resolution pixels and square pixel spacing with reduced speckle at a cost of reduced spatial resolution.

For IW and EW GRD products, multi-looking is performed on each burst individually. All bursts in all sub-swaths are then seamlessly merged to form a single, contiguous, ground range, detected image per polarization.

The products in this collection are ISO compliant XML metadata created by the Alaska Satellite Facility Distributed Active Archive Center from the associated Sentinel-1C SAFE format product.

Sentinel-1 任务通过双极化C 频段合成孔径雷达(SAR) 仪器（频率为5.405GHz，即 C 频段）提供数据。此集合包含使用Sentinel-1 Toolbox 处理的S1 地面探测范围(GRD) 场景，可生成经过校准的正射校正产品。此合集每天更新一次。新媒体资源会在两…

The Sigma0 product describes how much of the radar signal that was sent out by Sentinel-1 is reflected back to the sensor, and depends on the characteristics of the surface. This product is derived from the L1-GRD product. Typical SAR data processing, which produces level 1 images such as L1-GRD product, does not include radiometric corrections and significant radiometric bias remains. Therefore, it is necessary to apply the radiometric correction to SAR images so that the pixel values of the SAR images truly represent the radar backscatter of the reflecting surface. The radiometric correction is also necessary for the comparison of SAR images acquired with different sensors, or acquired from the same sensor but at different times, in different modes, or processed by different processors. For this Sigma0 product, radiometric calibration was performed using a specific Look Up Table (LUT) that is provided with each original GRD product. This LUT applies a range-dependent gain including the absolute calibration constant, in addition to a constant offset. Next to calibration, also orbit correction, border noise removal, thermal noise removal, and range doppler terrain correction steps were applied during production of Sigma0. The terrain correction step is intended to compensate for distortions due to topographical variations of the scene and the tilt of the satellite sensor, so that the geometric representation of the image will be as close as possible to the real world.

Sentinel-1 미션은 5.405GHz (C 대역)에서 이중 편파 C 대역 합성 개구 레이더 (SAR) 기기의 데이터를 제공합니다. 이 컬렉션에는 Sentinel-1 Toolbox를 사용하여 보정되고 직교 보정된 제품을 생성하도록 처리된 S1 지상 범위 감지 (GRD) 장면이 포함되어 있습니다. 컬렉션은 매일 업데이트됩니다. 새 애셋은 2일 이내에 인제스트됩니다.

DE Africa’s Sentinel-1 backscatter product is developed to be compliant with the CEOS Analysis Ready Data for Land (CARD4L) specifications. The Sentinel-1 mission, composed of a constellation of two C-band Synthetic Aperture Radar (SAR) satellites, are operated by European Space Agency (ESA) as part of the Copernicus Programme. The mission currently collects data every 12 days over Africa at a spatial resolution of approximately 20 m. Radar backscatter measures the amount of microwave radiation reflected back to the sensor from the ground surface. This measurement is sensitive to surface roughness, moisture content and viewing geometry. DE Africa provides Sentinel-1 backscatter as Radiometrically Terrain Corrected (RTC) gamma-0 (γ0) where variation due to changing observation geometries has been mitigated. The dual polarisation backcastter time series can be used in applications for forests, agriculture, wetlands and land cover classification. SAR’s ability to ‘see through’ clouds makes it critical for mapping and monitoring land cover changes in the wet tropics.

Copernicus Sentinel-1 Level-1 Ground Range Detected (GRD) products consist of focused SAR data that has been detected, multi-looked and projected to ground range using an Earth ellipsoid model. This dataset contains interferometric wide swath ground range detected high resolution data available over Brazil.

This collection contains Sentinel-1 Level-1 Ground Range Detected (GRD) products which consist of focused SAR data that have been detected, multi-looked and projected to ground range using an Earth ellipsoid model. Sentinel-1 is a polar-orbiting, all-weather, day-and-night C-band radar imaging mission funded by the European Union and carried out by the ESA within the Copernicus Programme, consisting of a constellation of two satellites. Sensor: C-SAR (Synthetic Aperture Radar) Repeat rate: 12 days (1 satellite), 6 days (2 satellites) Launch date: 03 April 2014 Archive start date: 12 April 2014 Mission Status: ongoing Terms and conditions for the use of Sentinel data https://scihub.copernicus.eu/twiki/pub/SciHubWebPortal/TermsConditions/T... Sentinel-1 Mission Overview https://sentinel.esa.int/web/sentinel/missions/sentinel-1 Sentinel-1 Level-1 GRD Products Overview https://earth.esa.int/web/sentinel/technical-guides/sentinel-1-sar/produ... Spatial resolution of Sentinel-1 Level-1 GRD data https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/... File format of measurement data: GeoTIFF Suggested software: ESA SNAP/Sentinel Toolbox http://step.esa.int/main/download/ Sentinel-1 acquisition plans: https://sentinel.esa.int/web/sentinel/missions/sentinel-1/observation-sc...

SpatioTemporal Asset Catalog (STAC) Item - S1A_IW_GRDH_1SDV_20250616T102903_20250616T102928_059670_0768C5_26E9 in sentinel-1-grd-bundle-1

Sentinel-1 ミッションは、5.405 GHz（C 帯域）の二重偏波 C 帯域合成開口レーダー（SAR）機器からデータを提供します。このコレクションには、Sentinel-1 Toolbox を使用して処理され、キャリブレーションと正射補正が行われたプロダクトを生成する S1 Ground Range Detected（GRD）シーンが含まれています。コレクションは毎日更新されます。新しいアセットは、利用可能になってから 2 日以内に取り込まれます。 このコレクションには、すべての GRD シーンが含まれています。各シーンには、3 つの解像度（10、25、40 メートル）、4 つのバンドの組み合わせ（シーンの偏光に対応）、3 つの機器モードのいずれかがあります。モザイク コンテキストでコレクションを使用する場合は、均質なバンドとパラメータのセットにフィルタリングする必要がある可能性があります。コレクションの使用と前処理の詳細については、こちらの記事をご覧ください。各シーンには、機器の偏光設定に応じて、4 つの偏光帯域のうち 1 つまたは 2 つが含まれます。可能な組み合わせは、シングルバンド VV、シングルバンド HH、デュアルバンド VV+VH、デュアルバンド HH+HV です。 VV: 単一の共偏波、垂直送信/垂直受信 HH: 単一の共偏波、水平送信/水平受信 VV + VH: デュアルバンド クロス偏波、垂直送信/水平受信 HH + HV: デュアルバンド クロス偏波、水平送信/垂直受信 各シーンには、楕円体からの入射角（度単位）を各ポイントで近似的に示す「角度」バンドも含まれています。このバンドは、各アセットに提供される 'geolocationGridPoint' グリッド フィールドの 'incidenceAngle' プロパティを補間して生成されます。 各シーンは、次の手順で Sentinel-1 Toolbox を使用して前処理されました。 熱ノイズ除去 放射量測定の調整 SRTM が利用できない緯度 60 度を超える地域で、SRTM 30 または ASTER DEM を使用した地形補正。最終的な地形補正値は、対数スケーリング（10*log10(x)）によってデシベルに変換されます。 これらの前処理の手順について詳しくは、Sentinel-1 の前処理に関する記事をご覧ください。Sentinel-1 画像の操作に関するその他のアドバイスについては、SAR の基本に関する Guido Lemoine のチュートリアルと SAR の変化検出に関する Mort Canty のチュートリアルをご覧ください。 このコレクションはオンザフライで計算されます。基盤となるコレクションで未加工の電力値（更新が速い）を使用する場合は、COPERNICUS/S1_GRD_FLOAT をご覧ください。

La missione Sentinel-1 fornisce dati da uno strumento radar ad apertura sintetica (SAR) in banda C a doppia polarizzazione a 5,405 GHz (banda C). Questa raccolta include le scene S1 Ground Range Detected (GRD), elaborate utilizzando Sentinel-1 Toolbox per generare un prodotto calibrato e ortorettificato. La raccolta viene aggiornata ogni giorno. I nuovi asset vengono inseriti entro due…

Die Sentinel-1-Mission liefert Daten von einem Dual-Polarisations-C-Band-SAR-Instrument (Synthetic Aperture Radar) bei 5,405 GHz (C-Band). Diese Sammlung enthält die S1-GRD-Szenen (Ground Range Detected), die mit der Sentinel-1-Toolbox verarbeitet wurden, um ein kalibriertes, orthokorrigiertes Produkt zu generieren. Die Sammlung wird täglich aktualisiert. Neue Assets werden innerhalb von zwei …

This dataset provides seven Sentinel-1 Synthetic Aperture Radar (SAR) scenes covering a portion of the Madeira River in Brazil from Porto Velho to Abuna. Each scene has been pre-processed for the use of detecting artisanal and small-scale mining (ASM) riverine dredges. The scenes were collected from the ASF search vertex (https://search.asf.alaska.edu/#/) as L1 Detected High-Res Dual-Pol (GRD-HD) products. They were acquired using a C-band SAR with the Interferometric Wide Swath (IW) mode, VV and VH polarizations, and a temporal resolution of 6 days. Each SAR acquisition covers a 250 km swath; however, these have been clipped to the study area. They have a 20 m x 22 m (ground range x azimuth) resolution, a 10 m x 10 m pixel spacing, and an Equivalent Number of Looks (ENL) of 4.4. The data is collected in ascending and descending passes; although, only descending passes were available in the study area. Four of the dates (20190604, 20190616, 20190628, and 20190710) required two sce ...

Shape of Yliki Lake derived from Sentinel-1 SAR data

This dataset comprises Sentinel-1 Synthetic Aperture Radar (Sentinel-1 SAR GRD: C-band Synthetic Aperture Radar Ground Range Detected) data that represents the shape of Yliki Lake on various satellite overpass dates between 2019 and 2021.

This dataset contains Interferometric Wide swath (IW) Ground Range Detected (GRD) High Resolution (HR) C-band Synthetic Aperture Radar (SAR) data from the European Space Agency (ESA) Sentinel 1A satellite. Sentinel 1A was launched on 3rd April 2014 and provides continuous all-weather, day and night imaging radar data. The IW mode is the main operational mode. The IW mode supports single (HH or VV) and dual (HH+HV or VV+VH) polarisation. These data are available via CEDA to any registered scientific user in the UK.