MSG system over view

Transcription

1 MSG system over view

2 1 Introduction METEOSAT SECOND GENERATION Overview 2 MSG Missions and Services 3 The SEVIRI Instrument 4 The MSG Ground Segment 5 SAF Network 6 Conclusions

3 METEOSAT SECOND GENERATION - MSG

4 MSG Solutions Temporal resolution: 15 minutes instead of 30 minutes Spatial sampling at sub-satellite point: 3 km (1 km HR VIS) instead of 5 km (2.5 km VIS) More channels: 1 HR VIS, 2 VIS, 1 near IR, 4 IR windows, 2 WV, 1 Ozone and 1 CO 2 Exploitation of data separated into general processing centrally by EUMETSAT and specialised processing by specific centres (SAF)

5 MSG Services HRIT/LRIT Data Dissemination Image data Meteorological products MDD type data DCP data Foreign satellite data Data distribution via GTS Data and information retrieval service Raw image data retrieval Processed image data retrieval Meteorological products retrieval Information services

6 MSG Missions Multispectral Imagery Airmass Analysis Hi-Resolution Imagery Product Extraction Data Dissemination Data Collection Science Payload Geo Earth Radiation Budget Instrument (GERB) Search and Rescue Data Archive and Retrieval

7 THE MSG MISSIONS : ADVANTAGES Improved data for Nowcasting and severe weather (more accurate and more frequent) Higher resolution and more frequent data for the determination of winds and their height in the atmosphere Detection of low clouds and fog Measurement of Sea Surface Temperature Enhanced capacity of Data Collection System for climate monitoring and research Significant increase in the quality of data distributed to the users. Additional scientific GERB instrument for climate studies S&R package to monitor distress messages.

8 MOP/MTP - MSG Comparison METEOSAT First Generation (MOP/MTP) 3-channel Imaging Radiometer 100 RPM Spin-stabilised Body 5 years Station Keeping 720 kg in GTO orbit Flight qualified with Delta 2914, Ariane METEOSAT Second Generation (MSG) 12-channel Enhanced Imaging Radiometer 100 RPM Spinstabilised Body 7 years Station Keeping 2000 kg in GTO orbit Design compatibility with Ariane 4 and 5

9 COMPARISON MOP/MTP - MSG Old Meteosat (MTP) New Meteosat (MSG) Visible channels HRV Water Vapour 1 2 IR window (+absorption) 1 (+0) 6 (+2) Sampling distance VIS: 2.5 km VIS: 3 km / HRV: 1 km IR: 5 km IR: 3 km Radiometric Resolution 0.4 K 0.25 K Image Repeat Cycle 30 min 15 min Raw Data Rate 333 kbps 3200 kbps Data Collection System 33 regional 0.1 kbps 224 regional 0.1 kbps 33 international 33 international Primary Dissemination HRI: 166 kbps HRIT: 1000 kbps Secondary Dissemination WEFAX: analogue LRIT: 128 kbps MDD MDD: up to 4x2kbps (data in LRIT) DCP DRS: 12.5 kbps (data in LRIT)

10 METEOSAT SECOND GENERATION Overview 3 The SEVIRI * Instrument * SEVIRI = Spinning Enhanced Visible and InfraRed Imager

11 The MSG Satellite

12 MSG Scanning Concept

13 Possible MSG HRV Scan Patterns 1 December - 31 May 1 June - 30 November

14 MSG IMAGE

15 IMAGE DATA: LEVEL 1.5 IMAGE DATA Definition: Image is geometrically corrected for all perturbations introduced by the satellite (e.g. orbit, spin, attitude, s/c manoeuvres, eclipse, etc.). The image is radiometrically corrected for all irregularities (e.g. differences between detectors, non-linearity, etc.). The HEADER and TRAILER information in the image data contains all relevant information. Absolute calibration is applied. Pixels represented by 10 bits. Size: Nominal level 1.5 image size is 3712 x 3712 pixels For HRV this becomes 5568 x Coverage: Full earth disk For HRV: Part coverage in East-West (see previous slide) Access: Via the U-MARF and in near real-time via HRIT/LRIT broadcasts

16 MSG SEVIRI Channels Basic + Airmass + Hi Res Vis Missions Basic Band (µm) Airmass Band (µm) VIS WV VIS WV IR IR O IR CO IR High Res VIS 1km Sampling IR HRV km data sampling intervals at SSP, except HRV (1 km) Images each 15 minutes

17 SEVIRI IR-Channel Bands

18 SEVIRI Channels Weighting Functions

19 IMAGE DATA: UTILISATION ASPECTS (1) Channel 0.6 and 0.8 µm 1.6 µm USE Cloud detection, scene identification, cloud tracking, aerosol observation, vegetation monitoring. Heritage from AVHRR Discriminates between snow and cloud, ice and water clouds. Aerosol information. Heritage from ATSR 3.9 µm 6.2 and 7.3 µm Low cloud and fog detection, Measurement of land and sea surface temperature at night. Spectral band broadened towards higher wavelength to improve signal-to-noise ratio. Heritage from AVHRR Upper- and mid-tropospheric water vapour, Cloud and water vapour tracking, Height allocation of semitransparent clouds 8.7 µm Quantitative information of thin cirrus clouds, Discriminates between ice and water clouds. Heritage from HIRS

20 IMAGE DATA: UTILISATION ASPECTS (2) Channel 9.7 µm USE Ozone radiances as input to NWP. Experimental channel used for tracking ozone patterns representative of wind motion in the lower stratosphere. Monitoring of evolution of total ozone field 10.8 and 12.0 µm 13.4 µm Measurement of earth surface and cloud top temperatures, Detection of cirrus and inference of total precipitable WV over sea. Split window channels from AVHRR Improvement of height determination of transmissive cirrus clouds, Temperature information from lower troposphere (cloud free areas) for instability assessment. Known from GOES VAS instrument.

21 METEOSAT SECOND GENERATION Overview 4 The MSG Ground Segment

22 MSG Ground Segment Networked configuration from the year 2002: Primary Ground Station under EUMETSAT control (Usingen, Germany) Back-up and Ranging Ground Station (Canary Islands, Spain) Acquisition of foreign satellite data Mission Control Centre at the EUMETSAT HQ (Darmstadt, Germany) Satellite Applications Facilities

23 The MSG Ground Station Located at Usingen, Germany

24 MSG MPEF MPEF is part of the Application Ground Segment (AGS) and constitutes, with the Satellite Application Facilities (SAF), the source of the Meteorological Products provided by the MSG system List of products to be extracted from Level 1.5 image data in the AGS has been agreed by EUMETSAT Member States As general principle, MPEF will generate products on a synoptic scale (better than 100 km) Important driver for the MPEF design and development Evolution of the MPEF algorithms and products Flexibility to add new algorithms and products ("plug-in approach")

25 MSG MPEF Products Baseline Atmospheric Motion Vectors (AMV) (IR 10.8, WV 6.2, WV 7.3, VIS 0.6) Calibration Monitoring (CAL-MON) Clear Sky Radiance (CSR) Climate Data Set (CDS) Cloud Analysis (CLA) Cloud Top Height (CTH) Global Instability (GI)* ISCCP Data Set (IDS) GPCP Precipitation Index (PI) Total Ozone (TOZ)* Tropospheric Humidity (THU) * GI + TOZ: product development by SAF and extraction by MPEF Meteorological Products proposed as baseline for the MSG MPEF development

26 The Satellite Application Facilities (SAF) In addition to the centralised Meteorological Product Extraction Facility in the EUMETSAT Headquarter in Darmstadt a Network of seven Satellite Application Facilities is under Development with the Objective to: Derive additional Products and Services Meet EUMETSAT requirements Located at National Meteorological Services User oriented network nodes

27 MSG Overview Conclusions Objectives MSG provides continuity of key observations of the Earth/Atmosphere system from the geostationary orbit Nominal MSG operations period of at least 12 years Spin stabilised satellite with 12 channel radiometer for operational meteorology climatology Application ground segment composed of MSG MPEF and the SAF network is a significant contribution for an optimal exploitation of MSG data More research and development effort required to optimise the use of MSG data