please shortly describe what data you use and what operator you applied.
Thank you for your reply.The data I used was Sentinel-1 data downloaded from the web of ASF.
which product level was downloaded and what operator did you apply which raised this error?
The order is ’ Radar<Sentinel-1 TOPS<s-1 Remove GRD Border Noise’’
and product is 
That’s the explanation:
GRD products are needed. You have SLC products.
You need to download other data for this operator. It is also available on the Copernicus Open Access Hub
1 Like
I got it.Thank you