trained model donwload

Hi @hmf21 
    I'm very happy to see your great work! drone auto nav in gps-denied env is very hard! 
    I want to run your demo use your data
    but trained model can't donwload, this link is empty, can you help me to solve this problem?
    https://cloud.tsinghua.edu.cn/d/eebd9d4c83eb4fe2b20c/?p=%2FCheckpoint&mode=list
