I haven't really computered much in the pandemic age; I've mostly been focused on bees, mead, and a few other life things.
I picked up a hackRF from a friend of mine; now I have to figure out how to use it. I've got a copy of Explore Software Defined Radio so maybe I'll go through that. I've got gnuradio and gqrx installed; at first, I couldn't get APRS decoding working, though I was able to pick up a local FM station (KQED). After fixing my antenna (all radio problems are basically antenna problems), I was able to do some decoding.
I also made a short recording of the packets in LSB mode.
There's also a mysterious Hughes 500 that flies around my house that's masked by FlightAware and the like; I'd like to figure out what it is and what it's doing. I think the answer to that is to write an ADS-B scanner and be able to go back and find out where and what it is. I'm writing an ADS-B parser to shovel packets into Postgres.
On knowledge graphs
I have this idea to build a notebook that incorporates location; sometimes I remember where I was but not what I was doing and I kind of want to explore that dimensionality. I kind of have some code in CL sketched out like
(defclass nodemeta () ((id :col-type string :initform (gen-uuid-v4)) (timestamp :col-type integer :initform (timestamp-now) :initarg :timestamp) (location :col-type geo :initform (current-location) :initarg :location) ;;; TODO: have to figure out how to handle `vars`! (vars (make-hash-table :test #'equal)))) (defclass node () ((id :col-type string :initform (gen-uuid-v4)) (contents :col-type blob :initarg :contents) (mimetype :col-type text :initarg :mimetype)))
There's some big questions to figure out, but most relevant are techniques for associating some data with a time and location so they can be indexed / searched by both, and also figuring out a relevant data store (I'd love an object store with full-text search and indexed by geotemporal keys) - I'm leaning towards PostGIS, but I also kind of want to investigate Neo4J as an option. This is something to dig into.