Home' RTCA Documents for Review : C2 Link Systems MASPS_Draft Contents Appendix B
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2. The UA carries a Flight Guidance System (FGS) and is never operated with pilot inputs
made directly to the aerodynamic surfaces on the UA. This FGS is certified to control
the aircraft during takeoff and landing of the UA.
3. The UAS is assumed to be equipped with the following:
VHF ATC radio(s), compliant with TSO-C169a,
An approved cooperative surveillance system.
Class 1 DAA system with a low SWAP onboard radar compliant with DO-365
GPS Wide Area Augmentation System (WAAS) Navigation system compliant
with AC 20-138D.
Current navigation database compliant with DO-201A and AC 20-153B.
4. Services and infrastructure provided by the FAA to support the UAS are based on
capabilities on the date of publication of this MASPS. It should be noted that the
Advanced ATM capabilities planned as a part of the NextGen transformation of the
NAS must be assessed for their impact on the requirements contained in this MASPS.
Linear Sensing CONOPS Power Line Scenario
As described in the CONOPS, within the U.S., there are tens of thousands of miles of
infrastructure that have regulatory requirements for routine inspection. Power lines,
railways, pipelines, are the most common examples; another would be flights al ong
shorelines or over fixed natural or man-made structures. The power line inspection is most
common and many UAS operators are seeking to replace manned aircraft for this operation.
Many of these power lines go on for miles, pass through all airspace classes, and current
video and infrared sensors require the aircraft to fly relatively close to the lines to detect
breaks in the conductors, vegetation growing on the towers, and other potential damage.
With these operational challenges, this type of mission would present many potentially
demanding conditions to the satisfactory operation of the C2 Link System.
Powerline Inspection operations include being conducted beyond visual line of sight of the
remote pilot and typically operate at low velocities and at low altitudes to enable the sensors
to detect the conditions that would trigger mandatory or preventative maintenance of the
power lines being inspected. Powerline Inspections are required by Federal and State
regulations and occur in all classes of airspace and over rural, suburban, and urban
population densities. The description of this scenario takes place in a generalized
metropolitan area as this type of environment provides opportunities for multiple complex
Use Cases that will help determine minimum requirements for C2 Link Systems.
Additional Assumptions for this Power Line Inspection Scenario
The UA is a medium size (i.e., neither small nor large/HALE) fixed wing UA with
quadrotors used for vertically takeoff and landing. This type of UA would be part of
the Risk Class 3 aircraft as described in APPENDIX D (see Table D-1: Risk Matrix).
The UA carries an Electro-Optical/Infra-Red (EO/IR) camera package to detect
vegetation encroaching on the right of way and degradation of the insulators and
structure. Optimum sensor operation is at 1000’ above ground level (AGL) at 30 knots
indicated airspeed (KIAS).
The UA is equipped with both satellite and terrestrial links.
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