Home' RTCA Documents for Review : DO-213A Change 1 Contents 1
DO-213A Change 1
© 2018 RTCA, Inc.
PURPOSE AND SCOPE
This document contains minimum operational performance standards for radomes for use with
airborne weather radars with or without forward-looking windshear detection capability. These
standards specify radome characteristics for designers, manufacturers, installers, and users of
The radome is an integral part of the aircraft's structural, aerodynamic, and electromagnetic
design. In radome design, these factors must be considered for certification.
Compliance with these standards is one means of assuring that the radome will perform its
intended function(s) satisfactorily under all conditions normally encountered in routine
aeronautical operations. Any regulatory application of this document is the sole responsibility
of appropriate governmental agencies.
Section 1 of this document provides information needed to understand the rationale for radome
characteristics and requirements stated in the remaining sections. It describes typical
equipment applications and operational goals, as envisioned by RTCA, and establishes the
basis for the standards stated in Sections 2 through 3. This section also includes definitions
and assumptions essential to proper understanding of this document.
Section 2 contains the minimum performance standards for the equipment under standard and
environmental conditions. Also included are recommended ground test procedures necessary
to show equipment compliance with the stated minimum requirements.
Section 3 describes the performance required of the installed radome.
Appendix A is an informative appendix, which discusses typical causes of radome
Appendix B is an informative appendix. It provides general guidelines for proper radome
maintenance and repair.
Appendix C, a normative appendix, describes test range qualification.
Appendix D, a normative appendix, illustrates sidelobe level determination.
The word "radome" as used herein includes all components necessary (as determined by the
manufacturer or installer) for the radome to perform its function properly. For example, the
"radome" normally includes the basic radome structure (electromagnetic window), a paint
system on the outside (standard aircraft polyurethane paint or a rain erosion paint), antistatic
protection system, other rain erosion protection such as an adhesive-backed polyurethane film
or rubber boot, lightning protection devices, etc. In this illustrative example, all these
components comprise the "radome.” It should not be inferred that every radome configuration
will necessarily include (or be limited to) these components or units. This will depend on the
design chosen by the radome manufacturer.
Some radome designs, as an example, may not include rain erosion protection or antistatic
protection, per se.
The radome as part of the radar system is an electromagnetic window, tuned to the operating
frequencies of the radar equipment within the radome. It protects the antenna from the
environment outside the aircraft, which includes aerodynamic pressure, rain, static electricity,
lightning, hail, bird strikes, and other impact loads.
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