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Preparation of MTG era with RTTOV-13.0: status of MTG-I/FCI and MTG-S/IRS data generation.

New developments with RTTOV-13.0 has been made. Synthetic MTG-I/FCI, MTG-S/IRS and IASI images and products for case studies 1st May 2019 generated with RTTOV-13.0 are available in these links:

Note: this web page has been created to allow access to animations in the presentations. One complete web page describing the activities and case studies will be published later.

Synthetic MTG-I/FCI images case study 1st May 2019

Synthetic MTG-I/FCI airmass RGBs generated using RTTOV-13.0 every 10 minutes on MTG-I/FCI projection at IR 1x1 resolution (2x2km on nadir) for the 16 VIS and IR channels on clear and cloudy conditions have been generated.

montage_16_FCI_channels_cloudy_2019-05-01
Montage for the 16 VIS and IR channels on cloudy conditions with reduced size to 22.5%

Synthetic MTG-I/FCI RGBs

Synthethic MTG-I/FCI airmass RGBs generated using RTTOV-13.0 every 10 minutes on MTG-I/FCI projection at IR 1x1 resolution (2x2km on nadir)
FCI_rgb_airmasRGB2019-05-01
To download the video AVI file with the loop of synthetic FCI airmass RGB click on the image or use this link

Synthethic MTG-I/FCI natural RGBs generated using RTTOV-13.0 every 10 minutes on MTG-I/FCI projection at IR 1x1 resolution (2x2km on nadir)
combination of synthetic MTG-FCI true color and natural
        RGB
To download the video AVI file with the loop of synthetic FCI natural RGB click on the image or use this link

Synthethic MTG-I/FCI true-color RGBs generated using RTTOV-13.0 every 10 minutes on MTG-I/FCI projection at IR 1x1 resolution (2x2km on nadir) combination of synthetic MTG-FCI true color and natural
        RGB
To download the video AVI file with the loop of synthetic FCI truecolor RGB click on the image or use this link

Synthetic MTG-S/IRS images case study 1st May 2019

Synthetic MTG-S/IRS dataset. Synthetic MTG-S/IRS BT spectra on clear air and cloudy conditions generated using RTTOV-13.0 and using as input ECWMF on hybrid level every 1 hour with 0.1x0.1 degrees.

Case study 2019-05-01 from 12:00Z to 23:30Z every 30 minutes on MTG-I/FCI projection on boxes IR 2x2 (resolution 4x4km on nadir) on MTG-I/FCI grid. Thus, the resolution of these images is similar to theoretical IRS spatial resolution about 4x4 km (IR channels MTG-I/FCI resolution is 2x2 km at nadir). It has been calculated with MTG-I/FCI zenith angles.

As example is shown a loop of synthetic MTG-S/IRS nearest to IASI channels at 695, 706, 734 and 919.5 cm-1. The wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.


IASI at
      different wavelenghts

Synthetic MTG-S/IRS airmass RGBs generated using RTTOV-13.0 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).
IASI airmass RGB
To download the video AVI file with the loop click on the image or use this link

Comparison of cloudy and clear-air synthetic MTG-S/IRS airmass RGBs generated using RTTOV-13.0 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2(resolution 4x4km on nadir). comparasion_IRS_FCI_airmass_RGB
To download the video AVI file with the loop click on the image or use this link

Synthetic IASI images case study 1st May 2019

Synthetic IASI dataset. Synthetic IASI BT spectra on clear air and cloudy conditions generated using RTTOV-13.0 and using as input ECWMF on hybrid level every 1 hour with 0.1x0.1 degrees.

Case study 2019-05-01 from 12:00Z to 23:30Z every 30 minutes on MTG-I/FCI projection on boxes IR 2x2 (resolution 4x4km on nadir) on MTG-I/FCI grid. Thus, the resolution of these images is similar to theoretical IRS spatial resolution about 4x4 km (IR channels MTG-I/FCI resolution is 2x2 km at nadir). It has been calculated with MTG-I/FCI zenith angles.

As example is shown a loop of synthetic IASI BT at 695, 706, 734 and 919.5 cm-1. The wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.


IASI at different
      wavelenghts


Synthetic IASI airmass RGBs generated using RTTOV-13.0 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).
IASI airmass RGB
To download the video AVI file with the loop click on the image or use this link

Comparison of cloudy and clear-air synthetic IASI airmass RGBs generated using RTTOV-13.0 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).
IASI airmass RGB
To download the video AVI file with the loop click on the image or use this link

Comparison of MTG-S/IRS images with IASI ones

Comparison of synthetic IASI and MTG-S/IRS BTs of nearest channels at 695, 706, 734 and 919.5 cm-1. The wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.

montage of IASI
      and IRS

Comparison of cloudy synthetic IASI and MTG-S/IRS airmass RGBs generated using RTTOV-13.0 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).

IASI airmass RGB
To download the video AVI file with the loop click on the image or use this link

Comparison of MTG-S/IRS and IASI RGB images with the MTG-I/FCI ones

Comparison of temporal resolution of synthetic FCI airmass RGBs every 10 mimutes (on 2x2 boxes) versus synthetic MTG-S/IRS airmass RGBs every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).
IASI
        airmass RGB
To download the video AVI file with the loop click on the image or use this link

Comparison of temporal resolution of synthetic FCI airmass RGBs every 10 mimutes (on 2x2 boxes) versus synthetic IASI airmass RGBs every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).

IASI
        airmass RGB
To download the video AVI file with the loop click on the image or use this link

More details are available in this web page

Generation of NWC SAF products using as input the synthetic images for MTG-I/FCI

Once the synthetic radiances of MTG-I/FCI have been generated, I have created an IDL program to use the "back door" mechanism in order to use the PGE00 MTG-I/FCI binary files as input to the GEO PGEs. The IDl program made:

a) It reads the array (nx, ny) of the structures from PGE00 MTG-I/FCI binary files for one slot

b) It converts the VIS channels to reflectivities and the IR channels to BTs or radiances

c) It writes in the DATABUF ($SAFNWC/tmp/SAT directory) the files (* .BT, * .refl, * .rad) needed to execute the different PGEs. To know what files to generate, the files generated in $SAFNWC/tmp/SAT are reproduced using one of the files available in the tests with the STRR testdata.

d) In DATABUF $SAFNWC/tmp/SAT directory a raw DTIME file is also written with all the pixels with value 0.0

Then it is posible to execute the PGEs. As a proof of concept, I have executed several of the PGEs for the MTG version. As can be seen in the example below, outputs of the PGEs are generated and the look is qualitatively good and consistent. The examples below are the first outputs of several PGEs:

animation of synthetic CT
      outputs
Animated GIF with the CT outputs generated using the synthetic PGE00 MTG-I/ FCI data 1st of May 2019 forecasted from 00:00Z to 23:50Z with cloudy RTTOV simulation.


animation CTTH outputs
Animated GIF with the CTTH altitude outputs generated using the synthetic PGE00 MTG-I/ FCI data 1st of May 2019 forecasted from 00:00Z to 23:50Z with cloudy RTTOV simulation.

animation of montage od CMIC outputs
Animated GIF with the montage CMIC parameters outputs generated using the synthetic PGE00 MTG-I/ FCI data 1st of May 2019 forecasted from 07:00Z to 17:00Z with cloudy RTTOV simulation.
Top left) IWP: Ice Water Path, Top right) LWP: Liquid Water Path, Bottom left) REFF: Effective Radius, Bottom right) COT: Cloud Optical Thickness.


The images with the PGEs outputs have been created with McIDAS-V. The idea is to use the profiles of T, q, CC (cloudiness), LWP, IWP etc to compare the outputs of the products with the "truth" used as input to RTTOV; the McIDAS-V will allow to do it interactively.

Note: In the RTTOV call when the solar zenith angle is greater than 75 degrees it is set to 75 degrees so there are VIS channels both day and night and the solar zenith angle is fixed to 75 degrees in the case it is greater than 75 degrees.


Synthetic MTG images using as input AEMET Harmonie NWP model

Synthetic MTG-I/FCI and MTG-S/IRS for case study 25 April 2021 are available in these links:

Synthetic MTG-FCI images from Harmonie NWP model

Synthetic MTG-I/FCI natural RGBs generated using RTTOV-13.0 every 1 hour on AEMET Harmonie 0.025x0.025 degrees grid
FCI_rgb_naturalRGB20210425
To download the video AVI file with the loop click on the image or use this link

Synthetic MTG-I/FCI airmass RGBs generated using RTTOV-13.0 every 1 hour on AEMET Harmonie 0.025x0.025 degrees grid
FCI_rgb_airmasRGB20210425
To download the video AVI file with the loop click on the image or use this link

Synthetic MTG-S/IRS L1 images from Harmonie NWP model

Synthetic MTG-S/IRS spectra on clear air and cloudy conditions generated using RTTOV-13.0 every 1 hour on AEMET Harmonie 0.025x0.025 degrees grid and using as input a combination of Harmonie and ECMWF (ozone profile) on the Harmonie 65 hybrid levels.
Case study 2021-04-25 from 00:00Z to 24:00Z every 1 hour.
As example is shown below a loop of synthetic MTG-S/IRS BT nearest at 695, 706, 734 and 919.5 cm-1 the wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.
MTG-S/IRS at different wavelenghts

Synthetic MTG-S/IRS L1 images from ECMWF high resolution experiment h3f7

ECMWF h3f7 experiment: it is a seasonal (4-months) nature run at 1.4km resolution, aggregated to 9km in MARS. A Baseline for Global Weather and Climate Simulations at 1 km Resolution, data is aggregated/truncated to 9km, and avail 3-hourly in MARS. See reference on: https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020MS002192
It has been used a modified PGE00 hyper version for use combination of h3f7 experiment and ECMWF operational (some fields as T are not available on hybrid levels). By this reason it has been changed the input to read the combination of the GRIBs file from h3f7 experiment and operational ECMWF model

ECMWF_exp_h3f7
The clouds in experiment h3f7 have a better spatial resolution than the same synthetic images from the ECMWF operational model shown below.

ECMWF_oper



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The loops below are maintained because are links from previous presentations.
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Note: since PDFs does not allow to include animations, this is a provisional web page just for provide links to the animations in the presentations. One complete web page describing the activities and case studies will be published later.

Synthetic MTG-I/FCI and MTG-S/IRS(using IASI as proxy) for case studies 1st May and 22th July 2019 are available in these links:

Synthetic MTG-FCI images

a) Case study 1st May 2019:

Synthetic MTG-I/FCI airmass RGBs generated using RTTOV-12.3 every 10 minutes on MTG-I/FCI projection at IR 1x1 resolution (2x2km on nadir)

FCI_rgb_airmasRGB2019-05-01
To download the video AVI file with the loop click use this link

b) Case study 22th July 2019:

Synthethic MTG-I/FCI true-color and natural RGBs generated using RTTOV-12.1 every 15 minutes on MSG/SEVIRI projection at IR 1x1 resolution (3x3km on nadir) combination of synthetic MTG-FCI true color and natural
        RGB
To download the video AVI file with the loop click use this link

Animated GIF with synthetic MTG-FCI VIS0.9 microns channel and the use for TPW estimation
VIS0.9 for estimation of TPW

Animated GIF with synthetic MTG-FCI NIR1.3 microns channel and the use for HL estimation (HL: precipitable water in High Layer)

NIR1.3 for estimation of HL


Synthetic IASI images as proxy of MTG-IRS L1 images

a) Case study 1st May 2019:

Synthetic MTG-S/IRS (using IASI as proxy) dataset. Synthetic IASI BT spectra on clear air and cloudy conditions generated using RTTOV-12.3 and using as input ECWMF on hybrid level every 1 hour with 0.1x0.1 degrees.

Case study 2019-05-01 from 12:00Z to 18:00Z every 30 minutes on MTG-I/FCI projection on boxes IR 2x2 (resolution 4x4km on nadir) on MTG-I/FCI grid. Thus, the resolution of these images is similar to theoretical IRS spatial resolution about 4x4 km (IR channels MTG-I/FCI resolution is 2x2 km at nadir). It has been calculated with MTG-I/FCI zenith angles.

As example is shown a loop of synthetic IASI BT at 695, 706, 734 and 919.5 cm-1 the wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.


IASI at different wavelenghts


Synthetic MTG-S/IRS (using IASI as proxy) airmass RGBs generated using RTTOV-12.3 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).
IASI airmass RGB
To download the video AVI file with the loop click use this link

Comparison of cloudy and clear-air synthetic MTG-S/IRS (using IASI as proxy) airmass RGBs generated using RTTOV-12.3 every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).

IASI airmass RGB
To download the video AVI file with the loop click use this link

Comparison of temporal resolution of synthetic FCI airmass RGBs every 10 mimutes (on 2x2 boxes) versus synthetic MTG-S/IRS (using IASI as proxy) airmass RGBs every 30 minutes on MTG-I/FCI projection at boxes IR 2x2 (resolution 4x4km on nadir).

IASI airmass RGB
To download the video AVI file with the loop click use this link

b) Case study 22th May 2019:

Loop of synthetic IASI BT spectra calculated with PGE00 using RTTOV-12.1 and as input ECWMF on hybrid level for 2019-07-22 from 12:00Z to 18:00Z every 30 minutes.

The synthetic IASI BTs has been calculated with SEVIRI zenith angles and resolution 1x1 pixels on MSG grid (3x3 km); same spatial resolution that above MTG-FCI images.

The region used is around the region covered by a future MTG-IRS dwell (160x160 array at 4x4 km).

As example is shown a loop of synthetic IASI BT at 695, 706, 734 and 919.5 cm-1; the wavenumbers has been selected in CO2 branch to provide top to down view in the atmosphere.

 IASI at
            different wavelenghts