English Translation Version for Reference Only Number:CTSO-C213 Date of approval:Jun 4 2019 CAAC Approved by:Xu Chaoqun China Civil Aviation Technical Standard Order This China Civil Aviation Technical Standard Order (CTSO)is issued according to Part 37 of the China Civil Aviation Regulations (CCAR-37).Each CTSO is a criterion which the concerned aeronautical materials parts or appliances used on civil aircraft must ply with when it is presented for airworthiness certification. Unmanned Aircraft Systems Control and Non-Payload Communications Terrestrial Link System Radios 1.Purpose. This China Civil Aviation Technical Standard Order (CTSO)is for manufacturers applying for Unmanned Aircraft Systems Control and Non-Payload Communications (CNPC)Terrestrial Link System Radios CTSO authorization (CTSOA).This CTSO prescribes the minimum performance standards(MPS)that Unmanned Aircraft Systems CNPC Terrestrial Link System Radios operating in C Band 5040-5050 megahertz (MHz)must meet for approval and identification with the applicable CTSO marking. The CNPC Link System shown in figure 1 is prised of a CNPC Airborne Radio System (ARS)and Ground Radio System (GRS) prising radios and their corresponding antennas.This CTSO is -1- English Translation Version for Reference Only CAAC CTSO-C213 specifically for the airborne and ground radio ponents of the ARS and GRS. Figure 1.CNPC Link System Components CNPC LINK SYSTEM CNPC GROUND CNPC AIRBORNE RADIO SYSTEM RADIO SYSTEM ANTENNA...