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Added model card.

README.md

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-license: mit
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+# Model Card for chimp_smhi_v3
+
+Retrieves surface precipitation and radar reflectivity from SEVIRI observations.
+
+
+## Model Details
+
+### Model Description
+
+The chimp_smhi_v3 model is a 2+1D convolutional network that retrieves ground-based radar reflectivity
+and surface precipitation estimates from 15-minute MeteoSat SEVIRI observations. It is trained used OPERA
+and BALTRAD composite radar reflectivities as well as GPM CMB surface precipitation estimates.
+
+{{ model_description | default("", true) }}
+
+- **Developed by:** Simon Pfreundschuh
+- **Model type:** CNN
+- **License:** MIT
+
+### Model Sources [optional]
+
+<!-- Provide the basic links for the model. -->
+
+- **Repository:** https://github.com/simonpf/chimp
+
+## Uses
+
+THe model is still experimental and should only be used for validation purposes at the current development stage.
+
+## How to Get Started with the Model
+
+See instruction at [https://github.com/simonpf/chimp_smhi][https://github.com/simonpf/chimp_smhi]
+
+## Training Details
+
+### Training Data
+
+Training was performed on two years (2019, 2020) of matched SEVIRI and OPERA/BALTRAD data.
+
+## Model Card Authors [optional]
+
+@simonpf
+
+## Model Card Contact
+
+@simonpf