About: http://webisa.webdatacommons.org/24623307

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	You can use a tool, such as an inclinometer or ???altitude tracker,??? which uses your line of site to the rocket and references it to a string held vertically due to gravity.
http://www.w3.org/ns/prov#wasQuotedFrom	adafruit.com