For 'Mach Two' some
RVR: http://www.pprune.org/military-aircr...ml#post7841682
Lockheed Martin F-35 Lightning II - Wikipedia, the free encyclopedia
"...Ground crews require Repair Verification Radar (RVR) test sets to verify the RCS after performing repairs...."[footnotes: 263, dead link]"
[footnote: 264] Brewer, Jeffrey and Shawn Meadows. "Survivability of the Next Strike Fighter", p. 23.
Aircraft Survivability: Susceptibility Reduction via Joint Aircraft Survivability Program Office (JASPO), Summer 2006.
http://www.dtic.mil/cgi-bin/GetTRDoc...f&AD=ADA529057 (PDF 2Mb)
OR
http://www.bahdayton.com/SURVIAC/asn...mer%202006.pdf (2Mb)
"...The aircraft signature design is derived using lessons learned from legacy stealth aircraft. However, the F-35 will employ updated materials and design techniques to ensure that low signature is maintained while keeping the aircraft affordable and supportable. The F-35 team has designed in an unprecedented number of access panels not requiring special Low Observable (LO) restoration compared to legacy LO aircraft. LO maintainers in the past have struggled, replacing tape and seal systems after maintenance events. The JSF team has fought to keep these time-intensive repairs to a minimum. In fact, most routinely accessed panels do not require any LO restoration. Additionally,
when performing a non-standard repair to the aircraft, the maintainer will have the option to use a Repair Verification Radar (RVR) to provide confidence in the RF performance of the repair. The maintainer will use the RVR to ensure that a proper repair was made and also to perform periodic inspections for potential non-visual defects. An advanced LO Health Assessment System (LOHAS) will prioritize LO restoration tasks based on maintenance tasks performed and defects recorded into the system to help the maintainer know what needs to be repaired for the next mission or what can be deferred to a later date. The JSF Team is working hard to eliminate unnecessary, or so called “recreational,” maintenance actions...."