I've asked a similar question before and have placed a feature request on the "ideas" site. I've not looked in version 8 to see if they've added this.
I found the following commands that might be helpful. This is the first I've looked at this and don't have any idea where the info for speed is stored..
Put the databas schema into a file named amp_schema
pg_dump -Uairwave airwave --schema-only > amp_schema
Export all fields from the table ap to a csv file. I don't know if what is needed is in this table or not.
dbcsv "select * from ap" > aps.csv