A 1976 investigation titled "A Transonic and Supersonic Investigation of Jet Exhaust Plume Effects on the Afterbody..." available via the NASA Technical Reports Server (NTRS).

V8_R601_G_80.41.1BR_GSQLIDOT679FK058_PDS010_LP0615_GSQLIDOT679FK_S061_E011_R003_G004_1FF-552.7z

It represents temperature data in degrees Fahrenheit during a "Quiescent Phase" test for rocket or aircraft skin and feeder-pipe components. 2. Motorola Firmware File

In NASA technical reports, "552.7 z" (often parsed as 552.7z by search engines) is a data value found in aerospace temperature tables .