WSPR local store instead of upload?

I wish there was a way I could store WSPR decodes locally on the flash card for later use, possibly to upload later or just use the data myself. I could have a beacon running on an antenna I would like to characterize while I drive the receiver around to different locations to measure the farfeild pattern of the antenna on the beacon. With the hardware that exists in my KiwiSDR, I imagine this should be possible?

Joe