update citation

README.md

@@ -13,4 +13,20 @@ inference:
 ---
 
 # satellite-instrument-bert-NER
-For details, please visit the [GitHub link](https://github.com/Tsinghua-mLin/satellite-instrument-NER).
+For details, please visit the [GitHub link](https://github.com/Tsinghua-mLin/satellite-instrument-NER).
+
+## Citation
+
+Our [paper](https://www.tandfonline.com/doi/full/10.1080/17538947.2022.2107098) has been published in the International Journal of Digital Earth :
+```bibtex
+@article{lin2022satellite,
+  title={Satellite and instrument entity recognition using a pre-trained language model with distant supervision},
+  author={Lin, Ming and Jin, Meng and Liu, Yufu and Bai, Yuqi},
+  journal={International Journal of Digital Earth},
+  volume={15},
+  number={1},
+  pages={1290--1304},
+  year={2022},
+  publisher={Taylor \& Francis}
+}
+```