Analysis with the augmented control variable for the skin tempererature analysis (winter 2020)

Title Analysis with the augmented control variable for the skin tempererature analysis (winter 2020)
Description Analysis experiement with the IFS cycle 47R1, on a cubic horizontal grid with a 399 spectral truncature, and 137 vertical levels. The skin temperature analysis for the assimilation of the radiance is realised with the augmented control variable. Experiment described as SKTACV in Massart et al. (2021) to be compared to the reference experiment hgef. The skin temperature analysis is stored in the 4v fields, parameter 90. Infrared fields: model levels 14 to 26 (step 0-13, time 09Z or 18Z). Microwave fields: model levels 27 to 39 (step 0-13, time 09Z or 18Z). Period of interest: 1 January 2020 to 31 March 2020.
DOI 10.21957/945j-a645
Experiment ID hgeg
Experiment class ECMWF Research Department
Examples

Infrared skin temperature analysis time 09:00Z step 0 for 1 January 2020

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer

server = ECMWFDataServer()

server.retrieve({
    "anoffset": "12",
    "class": "rd",
    "dataset": "research",
    "date": "2020-01-01",
    "expver": "hgeg",
    "levelist": "14",
    "levtype": "ml",
    "param": "90",
    "step": "0",
    "stream": "lwda",
    "target": "output.grib",
    "time": "09:00:00",
    "type": "4v"
})

METOP-A AMSUA ODB file for the 1 January 2020 00:00Z analysis 

#!/usr/bin/env python
from ecmwfapi import ECMWFDataServer

server = ECMWFDataServer()

server.retrieve({
    "class": "rd",
    "dataset": "research",
    "date": "2020-01-01",
    "expver": "hgeg",
    "reportype": "1007",
    "stream": "lwda",
    "target": "output.grib",
    "time": "00:00:00",
    "type": "mfb"
})