Radiometric resolution of sentinel 2

This gives a potential range of brightness levels from 0 4 095. Full resolution browse downloads will continue to be made available. We all know that when it come to pixels, small rules. However, worldview3 offers spatial, spectral, temporal and radiometric enhancements that when combined provide significant opportunity to perform a range of value added analysis. Results from the radiometric absolute calibration of sentinel 2a.

Sentinel 2 level 1c data are expressed in reflectance with a scaling factor, not in radiance. Lifetime trending, cross calibration and absolute calibration assessment over the libya 4 pics. Sentinel 2 fast track service compliance to land user requirements. Thanks to sentinel2 multispectral sensor, you get quality pictures of the. For this purpose a sensor simulation tool is designed. Radiometric resolution 4bit sentinel 2 tokyo coast. The spatial resolution of sentinel 2 is dependent on the particular spectral band.

Details on sentinel2 spatial resolution are provided in the spatial resolution section. Sentinel2 missions instrument payload sentinel handbook. Sentinel 2, launched as part of the european commissions copernicus program on june 23, 2015, was designed specifically to deliver a wealth of data and imagery. The sentinel 2 msi has 10 m and 20 m bands and there are six approximately spectrally equivalent landsat8 oli 30 m bands. While the 8bit image delivers more shades in each band with 256 in total. Slstr level1 and level2 processing baseline processing baseline 2. The sentinel 2 data contain uint16 spectral bands representing toa reflectance scaled by 0. Sentinel 2 data is available for download from the copernicus services data hub. Particularly with sentinel2, the first couple of years saw substantial changes in instrument calibration and data formats. The sentinel2 multispectral instrument msi acquires spectral bands ranging from visible and.

Multispectral images with 10, 20, and 30 m resolution from a spatially uniform area in the saharan desert were acquired for direct comparison of msi and oli top ofatmosphere toa reflectances. Gis ag maps developed landsat 8 and sentinel 2 scatter methods, as well as continual relative scatter calculators and tables based on principles in chavez 1988 that are customized for landsat 8 and sentinel 2 which have much greater radiometric resolution than landsat tm. Sentinel2 missions resolution and swath sentinel handbook. Resolution this obviously goes to sentinel2 for the 10m resolution in visual and nir bands. Jan 12, 2016 the narrow red and green bands of sentinel2 might be an issue but likely not that major for most applications.

Astrium gmbh, germany radiometric calibration of the msi instrument is achieved via a diffuser fitted on the inside face of the combined calibration and shutter mechanism csm figure 2. The first satellite, sentinel2a, has been launched in june 2015. Spatial resolutions sentinel2 msi user guides sentinel online. You are here home user guides sentinel3 olci resolutions radiometric. Radiometric calibration of sentinel2 products stack exchange. Sentinel2 data with existing and historical missions, and contributing to longterm time series data collection. The radiometric resolution of an instrument is a determination of the incremental level of intensity or reflectance that can be represented or distinguished by the system. We have not been able to verify the calculation method for the central value, but is. Find out more about space activities in our 22 member states, and understand how esa works together with. The spectral bands of sentinel2 range from the visible vnir and near infrared nir to the short wave infra red. Level1 data can be processed into either single look complex slc andor ground range detected grd products. The narrow red and green bands of sentinel2 might be an issue but likely not that major for most applications.

Sentinel2 offers a unique combination of global coverage with a wide field of view 290km, a high revisit 5 days with two satellites, a high spatial resolution 10m, 20m and 60m and multispectral imagery spectral bands in visible and shortwave infrared domains. This mission is composed of a constellation of two satellites, sentinel1a and sentinel1b, which share the same orbital plane. Here is presented a tool, s2rut, sentinel2 radiometric uncertainty tool allowing estimation of the radiometric uncertainties associated to each pixel using as input the topofatmosphere toa. Sentinel2 is delivered with three spatial resolution options. Sentinel 2a and 2b values are the average from the metadata files of each satellite esa, 2017a. The sentinel2 mission consists of two satellites developed to support vegetation, land cover, and environmental monitoring. The sentinel2a satellite was launched by esa on june 23, 2015, and operates in a sunsynchronous orbit with a 10day repeat cycle.

They carry a cband syntheticaperture radar instrument which provides a collection of data in allweather, day or night. Observations and recommendations for the calibration of. Data characteristics and radiometric calibration exchanged mission and data quality information between usgsnasa calibration team and esa sentinel2 team members in meeting in november in conjunction with pecora conference working with cnes lacherade, meygret to enter landsat8 oli. Revisit and coverage describes the high frequency of revisit for the systematic global coverage of land surfaces that forms the core of the sentinel 2 mission, and the latitudinal limits of the coverage. Sentinel 1 is the first of the copernicus programme satellite constellation conducted by the european space agency. The sentinel fleet of satellites is designed to deliver land remote sensing data that are central to the european commission. Radiometric resolution corresponds to the sensitivity of a sensor, i. Any data with the shorter file structure december 2016 and later is only supported in geomatica 2017 and later not geomatica 2016 or earlier. What is bit depth for satellite data and images gis. To handle this spatial resolution difference, the sentinel 2 10 m and 20 m data could be resampled to landsat8 30 m resolution, or the landsat8 data could be downscaled to sentinel 2 resolution li et al. User guides sentinel2 msi resolutions sentinel online. The syn level2 user products are produced at olci full resolution, and contain for the daylight part of the orbit over land and 5 nadir view and 5 oblique view slstr channels s1 s4, s6 as well as all olci channels except oa, oa14, oa15, oa19 and oa20. Level 1c processing includes radiometric and geometric corrections that include orthorectification and spatial registration according to a global reference system with subpixel accuracy. Sentinel2a provides highquality multispectral images with 10 m spatial resolution.

Sentinel2a and sentinel2b, operated by the european space agency esa within the framework of the copernicus program. Radiometric resolution is routinely expressed as a bit number, typically in the range of 8 to 16 bits. Downloading and preprocessing sentinel 2 images using the. Sentinel2 data are acquired in spectral bands in the vnir and swir. Sentinel2 is an earth observation mission from the copernicus programme that systematically. Sentinel2a msi and landsat8 oli radiometric cross comparison over desert sites julia a. With the launch of sentinel2b scheduled for early march 2017. The radiometric resolution is 12 bit with brightness intensity ranging from 04095. The landsat data access page will soon be updated with collection 2 information, for additional data access and download options. The sentinel2 satellites have spectral bands similar to landsat 8s excluding the thermal bands of landsat 8s thermal infrared sensor.

The point is to establish scatter for one band, then use the relative. Sentinel 2 is the european counterpart on landsat and provides freely available data to study climate change processes. After that, the two identical sentinel2 satellites sentinel2a and sentinel2b will provide an exceptional revisit capability of 5. Further details of how to calibrate sentinel1 level 1 products can be found in the radiometric calibration of s1 level1. To provide operational services over a long period at least 15 years following the launch of the first satellites, it is foreseen to develop a series of four satellites, with nominally two satellites in operation in orbit and a third one stored on ground as backup. Sentinel2a and 2b values are the average from the metadata files of each satellite esa, 2017a. The resolutions of the sentinel 2 mission and its payload msi instrument are threefold. Usgs eros archive sentinel2 comparison of sentinel2 and. The sentinel2a and landsat8 satellites carry onboard moderate resolution multispectral. We have not been able to verify the calculation method for the central value, but is not the midpoint between the min and max values. Radiometric comparison of sentinel 2a, sentinel 2b and landsat8. Sentinel2a satellite will be able to see very early changes in plant health due to its high temporal, spatial resolution and 3 red edge bands. It covers most of the regions in western new york area. Out of all the different civic optical earth observation missions, sentinel 2 is the first to have the ability to show three bands in the red edge.

The temporal resolution of a satellite in orbit is the revisit frequency of the satellite to a particular location. To increase the amount of energy detected and thus, the radiometric resolution without reducing spatial resolution, we would have to broaden the wavelength range detected for a particular channel or band. Winsvold 1, bas altena 1, christopher nuth 1, thomas nagler 2 and 6 jan wuite 2. Ferran gascon esa sentinel 2 quality assurance bruno lafrance cssiesa sentinel 2 radiometric calibration adam lewis geoscience australia international data quality requirements jeff masek nasa harmonized landsat and sentinel data nima pahlevan ssainasa gsfc water applications of landsat and sentinel 2 david roy sdsu burned area mapping. Results from the radiometric absolute calibration of.

Radiometric resolution radiometric resolution is a measure of the ability of an imaging system to record different levels of brightness or tone. The greater the radiometric resolution the greater the range of intensities of radiation the sensor is able to distinguish and record. Sentinel2 msi radiometric characterization and cross. The sentinel2 data contain uint16 spectral bands representing toa reflectance scaled by 0. To handle this spatial resolution difference, the sentinel2 10 m and 20 m data could be resampled to landsat8 30 m resolution, or the landsat8 data could be downscaled to sentinel2 resolution li et al. This leads to reduced radiometric resolution the ability to detect fine energy differences. A new bayesian and probabilistic cloud detection has been implemented over sea bayesian and land probabilistic. The greater the radiometric resolution, the more accurate the sensed image will be. The european space agencys multispectral instrument on the sentinel2 satellite provides global from 83 degrees north 56 degrees south latitude 10meter resolution, multispectral images every 10 days 2015present. Sentinel 2 is a multispectral mission consisting of a pair of optical earth observation satellites. Sentinel 2 radiometric resolutions the spectral bands of sentinel 2 range from the visible vnir and near infrared nir to the short wave infrared swir. Radiometric comparison of sentinel 2a, sentinel 2b and. User guides sentinel3 synergy radiometric resolution. Radiometric color depth spatial resolution describes how much detail in a photographic image is visible to the human eye.

Characterization of sentinel2a and landsat8 top of. Radiometric resolution an overview sciencedirect topics. In the preliminary products shown this autumn, you had to divide by. May 07, 2018 sentinel2 carries an innovative wide swath highresolution multispectral imager with spectral bands 4432190 nm european space agency. The sentinel3 syn user guide provides a high level description of the syn product which relies on the combination of the products of olci and slstr instruments.

Gis ag maps sentinel2 surface reflectance tutorial. Working with sentinel2 data pci geomatics help center. Sentinel 2 is a wideswath, high resolution, multispectral imaging mission supporting copernicus land monitoring studies, including the monitoring of vegetation, soil and water cover, as well as observation of inland waterways and coastal areas. Sentinel2 is a multispectral operational imaging mission within the gmes global monitoring for environment and security program, jointly implemented by the ec european commission and esa european space agency for global land. F1 and f2 active fire bands are based on the same detectors as s7 and s8 but with an increased dynamic range to prevent saturation over fires. The revisit frequency of each single sentinel2 satellite is 10 days and the combined constellation revisit is 5 days. Nearnadir observations by the multispectral instrument msi onboard the sentinel2 and the operational land imager oli onboard landsat 8 were collected during two simultaneous nadir overpasses sno. The european space agency esa is europes gateway to space. Radiometric resolution is how finely a satellite or sensor divides up the radiance it receives in each band. Medium resolution satellite imagery, such as sentinel 2 and landsat 8 oli images, may have application limits when accurate cartographic detail standards are required. The spatial resolution of sentinel2 is dependent on the particular spectral band. The sentinel2 sensor model is characterized by three major parameters. The sentinel2a data has spectral bands very similar. Further details of how to calibrate sentinel 1 level 1 products can be found in the radiometric calibration of s1 level1 products generated by the s1 ipf document esaeopgcscoptn.

Share radiometric resolution 21 bands in visswir olci observation is performed simultaneously in 21 spectral bands, listed in the table below, ranging from the visible to the nearinfrared 400 nm to 1 020 nm. With the wellcalibrated landsat 8 oli as a reference, the comparison indicates that 6 msi bands are consistent with oli within 3% in terms of spectral band adjustment factors bi. Several different and variable spectral response functions, the radiometric resolution 12 bit and noise equivalent radiance ner values. Sentinel2 highresolution and optical imaging mission for land services sentinel3 global ocean and land monitoring mission sentinel4 geostationary atmospheric monitoring mission sentinel5 loworbiting atmospheric monitoring mission sentinel2 has been designed to provide land reflectance timeseries. You lose a lot of quality without the range of shading as seen in this 2 bit image. This paper presents an initial radiometric crosscalibration of the 8 corresponding spectral bands of the sentinel 2 msi and landsat 8 oli sensors. More information on spatial and radiometric resolutions used in sentinel 2. Sentinel2 is an esa land monitoring mission with two identical satellites that provide high resolution optical imagery. Gis ag maps developed landsat 8 and sentinel2 scatter methods, as well as continual relative scatter calculators and tables based on principles in chavez 1988 that are customized for landsat 8 and sentinel2 which have much greater radiometric resolution than landsat tm. B5 705 nm, b6 740 nm, b7 783 nm, b8a 865 nm, b11 1610 nm and b12 2190 nm. All sentinel2 data products are provided free of charge to all data users, including the general public, and scientific and commercial users under the terms and conditions prescribed by the european commissions copernicus programme. Spacecraft launch mission status sensor complement ground segment references. In december 2016 the sentinel 2 file structure was changed. Fully operational in combination with sentinel2b, launched on 7 march 2017, sentinel2 provides a 5day repeat coverage.

Its mission is to shape the development of europes space capability and ensure that investment in space continues to deliver benefits to the citizens of europe and the world. Sentinel 2 metadata shows the min, max, and central value of each bands. The scaling factor is given in the xml file at the root of the product directory. Sentinel2 carries an innovative wide swath highresolution multispectral imager with spectral bands 4432190 nm european space agency. Sentinel3 l2 syn vg10 collection radiometric resolution. Using this tool, all meaningful sensor configurations are defined. This mission is composed of a constellation of two satellites, sentinel 1a and sentinel 1b, which share the same orbital plane. Defines the temporal, radiometric and spatial resolution of the sentinel 2 mission. Sentinel1 is the first of the copernicus programme satellite constellation conducted by the european space agency. The 4bit image has less variety in pixels like a classic nintendo game. Sentinel2 metadata shows the min, max, and central value of each bands. Sentinel2 the optical imaging mission for land services. Sentinel2 is a wideswath, highresolution, multispectral imaging mission supporting copernicus land monitoring studies, including the monitoring of vegetation, soil and water cover, as well as observation of inland waterways and coastal areas.

Sentinel 2a provides highquality multispectral images with 10 m spatial resolution. With the launch of sentinel 2b scheduled for early march 2017. Radiometric resolution is a measure of the ability of an imaging system to record different levels of brightness or tone. The sentinel 2 sensor model is characterized by three major parameters. Radiometric resolution is typically expressed as the number of bits for each band. We have downloaded one scene of sentinel2 multispectral images from copernicus open data hub that was acquired on september 21st, 2017. Sentinel 2 shows considerable promise over other medium resolution sensors through improved spectral band placement and narrow bandwidths which may prove useful to cope with spectrally complex benthic reflectances, along with improvements in spatial resolution and instrument noise. Out of all the different civic optical earth observation missions, sentinel2 is the first to have the ability to show three bands in the red edge. Particularly with sentinel 2, the first couple of years saw substantial changes in instrument calibration and data formats. Radiometric resolution is the capacity of the instrument to distinguish differences in light intensity or reflectance. Astrium gmbh, germany radiometric calibration of the msi instrument is achieved via a diffuser fitted on the inside face of the. The satellite is equipped with an optoelectronic multispectral sensor for surveying with a sentinel 2 resolution of 10 to 60 m in the visible, near infrared vnir, and shortwave.

The ability to resolve, or separate, small details is one way of. However, worldview3 offers spatial, spectral, temporal and radiometric enhancements that when combined provide significant opportunity to perform a range of. Sentinel images have a swath width of 290 km and a. Radiometric resolutions sentinel2 msi user guides sentinel. The revisit frequency of each single sentinel 2 satellite is 10 days and the combined constellation revisit is 5 days. The image below is an example of the full resolution browse and level1 band download options that will be available in earthexplorer. The spatial and radiometric resolution of sentinel2 imagery varies by spectral band. Both landsat and sentinel 2 are excellent imaging systems, but it has been difficult to keep pace with changes in data formats and data processing versions. Radiometric resolution 21 bands in visswir olci observation is performed simultaneously in 21 spectral bands, listed in the table below, ranging from the visible to the nearinfrared 400 nm to 1 020 nm.

Here is presented a tool, s2rut, sentinel 2 radiometric uncertainty tool allowing estimation of the radiometric uncertainties associated to each pixel using as input the top of atmosphere toa. Sentinel1 radarimaging mission for land and ocean services sentinel2 highresolution and optical imaging mission for land services sentinel3 global ocean and land monitoring mission sentinel4 geostationary atmospheric monitoring mission sentinel5 loworbiting atmospheric monitoring mission sentinel2 has been designed to. The sentinel2 msi has 10 m and 20 m bands and there are six approximately spectrally equivalent landsat8 oli 30 m bands. Note however landsat has the lead in the shortwave blue band with 30m vs.