CTSO-2C608 独立式北斗机载导航有源双频天线（B1C 和B2a 频段）

日期： 2023 年 3 月 24 日局长授权

批准：

中国民用航空技术标准规定

本技术标准规定根据中国民用航空规章《民用航空材料、零部件和机载设备技术标准规定》（CCAR37）颁发。中国民用航空技术标准规定是对用于民用航空器上的某些航空材料、零部件和机载设备接受适航审查时，必须遵守的准则。

独立式北斗机载导航有源双频天线（B1C 和 B2a 频段）

1. 目的

本技术标准规定（CTSO）适用于为独立式北斗机载导航有源双频天线（B1C 和 B2a 频段）申请技术标准规定项目批准书（CTSOA）的制造人。本 CTSO 规定独立式北斗机载导航有源双频天线（B1C和 B2a 频段）为获得批准和使用适用的 CTSO 标记进行标识所必须满足的最低性能标准。

2. 适用范围

本 CTSO 适用于自其生效之日起提交的申请。按本 CTSO 批准的设备，其设计大改应按 CCAR-21-R4 第 21.353 条要求重新申请CTSOA。

3. 要求

在本CTSO 生效之日或生效之后制造并欲使用本CTSO 标记进行标识的设备必须满足本 CTSO 附录 1 中规定的最低性能标准。

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CAAC CTSO-2C608

a. 功能

本 CTSO 标准适用于依据 CCAR-23、CCAR-25、CCAR-27、 CCAR-29 和 CCAR-31 审定的航空器上用于接收北斗卫星导航系统信号，并为在航路阶段使用的独立式北斗机载导航设备提供信号的有源双频天线（B1C 和 B2a 频段）。

b. 失效状态类别

（1）本 CTSO 第 3.a 节定义的功能，如果其失效而引起错误性信息，其为轻微失效状态；

（2）本 CTSO 第 3.a 节定义的功能丧失为无安全影响失效状态；

（3）设备的研制保证等级应至少与这种失效状态类别相对应。

c. 功能鉴定

应按本CTSO 附录1 中规定的试验条件，证明设备性能满足要求。

d. 环境鉴定

应按本 CTSO 附录 1 中的试验条件，采用该设备适用的标准环境条件和试验程序，证明设备性能满足要求。除 RTCA/DO- 160G 以外，申请人也可采用其它适用的标准环境条件和试验程序。

注 1：附录 1 中的部分性能要求无需在 RTCA/DO-160G 中所含的所有条件下进行试验。若可根据计算分析、相似设计对比分析等方法说明这些特定的性能参数不易受环境条件影响，且附录 1 中所规定的性能级别并不会因为暴露在此类特殊的环境条件下而发生明显削减，则此类试验可予以忽略。

e. 软件鉴定

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如果设备包含软件，则软件应按照 RTCA/DO- 178B《机载系统和设备合格审定中的软件考虑》（1992.12.1）或 RTCA/DO- 178C《机载系统和设备合格审定中的软件考虑》（2011.12.13）的要求进行研制。软件的设计保证等级应与本 CTSO 第 3.b 节规定的失效状态类别一致。

f. 电子硬件鉴定

如果设备中包含复杂电子硬件，则应按照 RTCA/DO-254《机载电子硬件设计保证指南》（2000.4.19）的要求进行研制。硬件的设计保证等级应与本 CTSO 第 3.b 节规定的失效状态类别一致。对于确定为简单的机载电子硬件，可按 RTCA/DO-254 中第 1.6 节的要求处理。

g. 偏离

如果采用替代或等效的符合性方法来满足本 CTSO 规定的最低性能标准（MPS），申请人必须表明设备保持了等效的安全水平。申请人应按照 CCAR-21-R4 第 21.368 条（一）要求申请偏离。

4. 标记

a. 至少应为一个主要部件设置永久清晰的标记，标记应包括CCAR-21-R4 第21.423 条（二）规定的所有信息。标记必须包含设备序列号。

b. 应为以下部件设置永久清晰的标记，标记至少包括制造人名称、组件件号、CTSO 标准号、类别和子类标识：

（1）所有容易拆卸（无需手持工具）的部件；

（2）制造人确定的设备中可互换的所有组件。

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c. 如果设备中包含软件和/或机载电子硬件，则件号必须能够表明软件和硬件的构型。件号编排时，在件号中可为硬件、软件和机载电子硬件各划分一个单独区域。

d. 可以使用电子标记标识软件或机载电子硬件，此标记可通过软件写入硬件部件内部，而不用将其标识在设备铭牌中。如果使用电子标记，则其必须容易读取，无需使用特殊工具或设备。

5. 申请资料要求

申请人必须向负责该项目审查的人员提交相关技术资料以支持设计和生产批准。提交资料包括 CCAR-21-R4 第 21.353 条（一）1规定的符合性声明和以下资料副本。

a. 手册，包括以下内容：

（1）运行说明和设备限制，该内容应对设备运行能力进行充分描述。

（2）对所有偏离的详细描述。

（3）安装程序和限制。必须确保按照安装程序安装设备后，设备仍符合本 CTSO 的要求。限制条件应确定任何特殊的安装要求。还必须以注释的方式包含以下声明：

“本设备满足技术标准规定（CTSO）中要求的最低性能标准和质量控制标准。如欲安装此设备，必须获得安装批准。”

（4）对于每个独立的软件和机载电子硬件构型，参照以下内容：

（i）软件件号，包括版本和研制保证等级；

（ii）机载电子硬件件号，包括版本和研制保证等级；

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（iii）功能描述。

（5）设备中每个部件进行环境鉴定的试验条件总结（例如，可采用 RTCA/DO- 160G “机载设备环境条件和试验程序 ”附录 A中的表格形式描述）。

（6）原理图、布线图以及设备安装所需的其它文件。

（7）设备的可更换部件清单（注明件号）。如适用，包括对供应商件号的交叉索引。

b. 持续适航文件，包含设备周期性维护、校准和修理要求，以保证设备的持续适航性。如适用，应包括建议的检查间隔和使用寿命。

c. 如果设备需要进行软件鉴定，则还应提供：软件合格审定计划（PSAC），软件构型索引和软件完结综述。

d. 如果设备需要进行硬件鉴定，则还应提供：硬件合格审定计划（PHAC），硬件构型索引和硬件完结综述。

e. 铭牌图纸，规定设备如何标识本 CTSO 第 4 节所要求的标记信息。

f. 确定设备中所包含而未按照本CTSO 第3 节进行评估的功能或性能（即：非 CTSO 功能）。在获得 CTSOA 的同时，非 CTSO 功能也一同被接受。接受这些非 CTSO 功能，申请人必须声明这些功能，并在 CTSO 申请时提供以下信息：

（1）非 CTSO 功能的描述。如：性能规范、失效状态类别、软件、硬件和环境鉴定类别。还应包括一份确认非 CTSO 功能不会影响设备对本 CTSO 第 3 节要求符合性的声明。

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（2）安装程序和限制，能够确保非 CTSO 功能满足本 CTSO中 5.f.(1)节所声明的功能和性能规范。

（3）本 CTSO 第 5.f.(1)节所描述的非 CTSO 功能的持续适航要求；

（4）接口要求和适用的安装试验程序，应确保对本 CTSO 第5.f.(1)节性能资料要求的符合性。

（5）（如适用）试验大纲、试验分析和试验结果，以验证 CTSO设备的性能不受到非 CTSO 功能影响。

（6）（如适用）试验大纲、试验分析和试验结果， 以验证本CTSO 中 5.f.(1)节所描述的非 CTSO 功能的功能和性能。

g. 按 CCAR-21-R4 第 21.358 条要求提供质量系统方面的说明，包括功能试验规范。质量系统应确保能检测到可能会对 CTSO 最低性能标准符合性有不利影响的任何更改，并相应地拒收该产品。

h. 材料和工艺规范清单。

i. 定义该设备设计的图纸和工艺清单（包括修订版次）。

j. 制造人的 CTSO 鉴定报告，表明按本 CTSO 第 3.c 节完成的试验结果。

6. 制造人资料要求

除直接提交给局方的资料外，还应准备如下技术资料供局方评审：

a. 功能鉴定规范，用于鉴定每件设备是否符合本 CTSO 要求；

b. 设备校准程序；

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c. 原理图；

d. 布线图；

e. 材料和工艺规范；

f. 根据本 CTSO 第 3.d 节要求进行的环境鉴定试验结果；

g. 如果设备包含软件，提供 RTCA/DO- 178B 或 DO- 178C 中规定的相关文档，包括所有支持 RTCA/DO- 178B 或 DO- 178C 附件 A“软件等级的过程目标和输出 ”中适用目标的资料；

h. 如果设备包含复杂电子硬件，应提供 RTCA/DO-254 附录 A 表A-1 中定义的与设计保证等级和硬件生命周期相关的资料。对于简单电子硬件，应提供以下资料：测试用例或程序，测试结果，测试覆盖率分析，工具评估和鉴定资料，构型管理记录并包含问题报告；

i. 如果设备包含非 CTSO 功能，制造商应提供本 CTSO 第 6.a 至6.h 节与非 CTSO 功能相关的资料。

7. 随设备提交给用户的资料要求

a. 如欲向一个机构（如运营人或修理站）提供一件或多件按本CTSO 制造的设备，则应随设备提供本 CTSO 第 5.a 和 5.b 节的资料副本，以及设备正确安装、审定、使用和持续适航所必需的资料。

b. 如果设备包含已声明的非 CTSO 功能，则还应包括本 CTSO第 5.f.(1)至 5.f.(4)节所规定资料的副本。

8. 引用文件

RTCA 文件可从以下地址订购：

Radio Technical Commission for Aeronautics, Inc.

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1150 18th Street NW, Suite 910, Washington D.C. 20036也可通过网站 www.rtca.org 订购副本。

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附录 1 独立式北斗机载导航有源双频天线（B1C 和 B2a 频段）最低

性能标准

本附录规定了独立式北斗机载导航有源双频天线（B1C 和 B2a频段）的最低性能标准。应满足 RTCA/DO-373《机载全球卫星导航系统（GNSS）L1/E1 和 L5/E5 频段有源天线设备最低性能标准》 （2018.6.21 发布）标准第 2 章中要求以及如下修改。

1. 修改 2.1.2 为“天线应具备制造商定义的预期功能，其合理使用不应对空域内其他用户造成危害 ”。

2. 修改 2.1.3 内容为“设备应遵守《中华人民共和国无线电管理条例》”。

3. 将 2.1.4 中注释改为“可以通过 CCAR-25-R4 附录 F 来表明符合性 ”。

4. 修改 2.2.1 中表格第一列“L5 GPS ”为“B2a BDS ”，修改 2.2.1 中表格第一列“L1 GPS ”为“B1C BDS ”，删除 E5a Galileo 和 E1 Galileo 频率。将全文中的“L1/E1”更改为“B1C”，“L5/E5a ”更改为“B2a”。

5. 删除 2.2.1 中表格下的 Note 注释。

6. 2.2.6.3 带内增益压缩点，修改 1149.45MHz 增益压缩点为“-2dbm ”；修改 1200.45MHz 增益压缩点为“-2dbm ”，其他频点不变。

7. 2.2.8 视轴相对增益频率响应，修改 1149.45MHz 频响为“-20dB ”；修改 1200.45MHz 频响为“-20dB ”，其他频点不变。

8. 删除 2.2.11.2 群时延与视线角要求。

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9. 2.4.2.2.6 差分群时延要求中“确认是否满足第 2.2.11.1 小节和2.2.11.2 小节的要求 ”，删除“2.2.11.2 小节 ”。

10. 2.4.2.6.2 表 2-7 中，修改 1149.45MHz 频点的场强值为“6.65”， 1200.45MHz 场强值为“6.9”。

11. 删除 2.4.2.4 中 Note 注释部分第 2 项。

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Number：CTSO-2C608

Date of approval：March 24, 2023

Approved by：Yang Zhenmei

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 comply with when it is presented for airworthiness certification.

Independent BDS Airborne Active Navigation Antenna for the B1C and B2a Frequency Bands

1. Purpose.

This China Civil Aviation Technical Standard Order (CTSO) is applicable to the manufacturers of the Project Approval for application of CTSO authorization (CTSOA) for independent BDS(BeiDou Navigation Satellite System) airborne active navigation antenna for the B1C and B2a frequency bands. This CTSO specifies the minimum performance standards(MPS) that independent BDS airborne active navigation antenna for the B1C and B2a frequency bands must first meet for approval and identification with the applicable CTSO marking.

2. Applicability.

This CTSO affects new application submitted after its effective date. Major design changes to article approved under this CTSO will require a new authorization in accordance with section 21.353 ofCCAR-21R4.

3. Requirements

The equipment manufactured on or after the effective date of this CTSO and intended to be marked with this CTSO mark shall meet the minimum performance standards specified in Appendix 1 of this CTSO.

a. Functionality.

This CTSO standard is applicable to the independent BDS airborne active navigation antenna for the B1C and B2a frequency bands used to receive signals from the BDS and provides signals for the independent BDS airborne navigation equipment used in the en-route phases of the aircraft certified according to CCAR-23, CCAR-25, CCAR-27, CCAR-29 and CCAR-31.

b. Failure Condition Classifications.

(1) Failure of the function defined in Section 3.a is a minor failure condition if it causes erroneous information.

(2) Loss of the function defined in Section 3.a is a failure condition without safety impact.

(3) Design the system to at least these failure condition classifications.

c. Functional Qualification.

The test conditions specified in Appendix 1 of this CTSO shall prove that the performance of the equipment meets the requirements.

d. Environmental Qualification.

According to the test conditions in Appendix 1 of this CTSO, the standard environmental conditions and test procedures applicable to the equipment shall be adopted to prove that the performance of the equipment meets the requirements. In addition to RTCA/DO-160G, the applicant may also adopt other applicable standard environmental conditions and test procedures.

Note 1：Some performance requirements in Appendix 1 are not required to be tested under all conditions contained in RTCA/DO-160G. If it can be shown that these specific performance parameters are not easily affected by environmental conditions according to calculation analysis, comparative analysis of similar designs, etc. and that the performance levels specified in Appendix 1 are not significantly reduced by exposure to such special environmental conditions, then this Class tests can be ignored.

e. Software Qualification.

If the article includes software, develop the software according to RTCA/DO-178C, Software Considerations in Airborne Systems and Equipment Certification, dated December 13, 2011, including referenced supplements as applicable, to at least the software level consistent with the failure condition classification defined in paragraph 3.b of this CTSO. The applicant may also develop the software according to RTCA/DO-178B, dated December 1, 1992.

f. Electronic Hardware Qualification.

If the article includes complex custom airborne electronic hardware, develop the component according to RTCA/DO-254, dated April 19, 2000, Design Assurance Guidance for Airborne Electronic Hardware, to at least the design assurance level consistent with the failure condition classification defined in paragraph 3.b of this CTSO. For custom airborne electronic hardware determined to be simple, RTCA/DO-254, paragraph1.6 applies.

g. Deviations.

For using alternative or equivalent means of compliance to the criteria in this CTSO, the applicant must show that the equipment maintains an equivalent level of safety. Apply for a deviation under the provision of 21.368(a) in CCAR-21R4.

4. Marking.

a. Mark at least one major component permanently and legibly with all the information in 21.423(b) of CCAR-21R4. The marking must include the serial number.

b. Also, mark the following permanently and legibly, with at least the manufacturer’s name, subassembly part number, and the CTSO number:

(1) Each component that is easily removable (without hand tools);

(2) Each subassembly of the article that manufacturer determined

may be interchangeable.

c. If the article includes software and/or airborne electronic hardware, then the article part numbering scheme must identify the software and airborne electronic hardware configuration. The part numbering scheme can use separate, unique part numbers for software, hardware, and airborne electronic hardware.

d. The applicant may use electronic part marking to identify software or airborne electronic hardware components by embedding the identification within the hardware component itself (using software) rather than marking it on the equipment nameplate. If electronic marking is used, it must be readily accessible without the use of special tools or equipment.

5. Application Data Requirements.

The applicant must furnish the responsible certification personnel with the related data to support design and production approval. The application data include a statement of conformance as specified in section 21.353(a)(1) in CCAR-21R4 and one copy each of the following technical data:

a. A Manual(s) containing the following:

(1) Operating instructions and equipment limitations sufficient to describe the equipment’s operational capability.

(2) Describe in detail any deviations.

(3) Installation procedures and limitations sufficient to ensure that the antenna equipment, when installed according to the installation or operational procedures, still meet this CTSO’s requirements. Limitations must identify any unique aspects of the installation. The limitations must include a note with the following statement:

“This article meets the minimum performance and quality control standards required by a CTSO. Installation of this article requires separate approval.”

(4) For each unique configuration of software and airborne electronic hardware, reference the following:

(i) Software part number including revision and design assurance level;

(ii) Airborne electronic hardware part number including revision and design assurance level;

(iii) Functional description.

(5) A summary of the test conditions used for environmental qualifications for each component of the article. For example, a form as described in RTCA/DO-160G, Environmental Conditions and Test Procedures for Airborne Equipment, Appendix A.

(6) Schematic drawings, wiring diagrams, and any other documentation necessary for installation of the antenna equipment.

(7) List of replaceable components, by part number, that makes up

the airborne equipment. Include vendor part number cross-references, when applicable.

b. Instructions covering periodic maintenance, calibration, and repair, for the continued airworthiness of the antenna equipment. Include recommended inspection intervals and service life, as appropriate.

c. If the article includes software: a plan for software aspects of certification (PSAC), software configuration index, and software accomplishment summary.

d. If the article includes hardware: a plan for hardware aspects of certification (PHAC), hardware configuration index and hardware completion accomplishment summary.

e. A drawing depicting how the article will be marked with the information required by paragraph 4 of this CTSO.

f. Identify functionality or performance contained in the article not evaluated under paragraph 4 of this CTSO (that is, non-CTSO functions). Non-CTSO functions are accepted in parallel with the CTSO authorization. For those non-CTSO functions to be accepted, the applicant must declare these functions and include the following information with CTSO application:

(1) Description of the non-CTSO function(s), such as performance specifications, failure condition classifications, software, hardware, and environmental qualification levels. Include a statement confirming that

the non-CTSO function(s) don’t interfere with the article’s compliance with the requirements of paragraph 3.

(2) Installation procedures and limitations sufficient to ensure that the non-CTSO function(s) meets the declared functions and performance specification(s) described in paragraph 5.f.(1).

(3) Continued airworthiness requirements for non-CTSO functions described in section 5.f.(1) of this CTSO.

(4) Interface requirements and applicable installation test procedures to ensure compliance with the performance data defined in paragraph 5.f.(1).

(5) (if applicable) Test plans, analysis and results, as appropriate, to verify that performance of the hosting CTSO article is not affected by the non-CTSO function(s).

(6) (if applicable) Test plans, analysis and results, as appropriate, to verify the function and performance of the non-CTSO function(s) as described in paragraph 5.f.(1).

g. The quality system description required by section 21.358 of CCAR-21R4, including functional test specifications. The quality system should ensure that it will detect any change to the approved design that could adversely affect compliance with the CTSO MPS, and reject the article accordingly.

h. Material and process specifications list.

i. List of all drawings and processes (including revision level) that define the article’s design.

j. Manufacturer’s CTSO qualification report showing results of testing accomplished according to paragraph 3.c of this CTSO.

6. Manufacturer Data Requirements.

Besides the data given directly to the authorities, have the following technical data available for review by the authorities:

a. Functional qualification specifications for qualifying each production article to ensure compliance with this CTSO.

b. Equipment calibration procedures.

c. Schematic drawings.

d. Wiring diagrams.

e. Material and process specifications.

f. The results of the environmental qualification tests conducted according to paragraph 3.d of this CTSO.

g. If the article includes software, the appropriate documentation defined in the version of RTCA/DO-178 specified by paragraph 3.e of this CTSO, including all data supporting the applicable objectives in Annex A, Process Objectives and Outputs by Software Level.

h. If the article includes complex custom airborne electronic hardware, the appropriate hardware life cycle data in combination with design assurance level, as defined in RTCA/DO-254, Appendix A, Table

A-l. For simple custom airborne electronic hardware, the following data: test cases or procedures, test results, test coverage analysis, tool assessment and qualification data, and configuration management records, including problem reports.

i. If the article contains non-CTSO function(s), the applicant must also make available items 6.a through 6.h as they pertain to the non-CTSO function(s).

7. Furnished Data Requirements.

a. If furnishing one or more articles manufactured under this CTSO to one entity (such as an operator or repair station), provide one copy or technical data and information specified in paragraphs 5.a and 5.b of this CTSO. Add any data needed for the proper installation, certification, use, or for continued compliance with the CTSO, of the antenna equipment.

b. If the article contains declared non-CTSO function(s), include one copy of the data in paragraphs 5.f.(1) through 5.f.(4).

8. Availability of Referenced Documents.

Order RTCA documents from:

1150 18th Street NW, Suite 910, Washington D.C. 20036

You may also order them online from the RTCA Internet website at: www.rtca.org.

Appendix 1 Minimum Performance Standards for Independent BDS Airborne Active Navigation Antenna for the B1C and B2a Frequency Bands

Independent BDS airborne active navigation antenna for the B1C and B2a frequency bands shall meet the requirements of Chapter 2 of RTCA/DO-373 “MOPSfor GNSS Airborne Active Antenna Equipment for the L1/E1 and L5/E5a Frequency Bands” and the following modifications

1. Modify 2.1.2 to “The antenna shall perform its intended function(s), as defined by the manufacturer, and its proper use shall not create a hazard to other airspace users” .

2. Modify 2.1.3 to “All equipment shall comply with the Radio Regulations of the People's Republic of China” .

3. Modify the note in 2.1.4 to “Compliance can be demonstrated through CCAR-25-R4 Appendix F” .

4. Modify “L5 GPS” in the first column of the table in 2.2.1 to “B2a BDS”, modify “L1 GPS" in the first column of the table in 2.2.1 to “B1C BDS”, and delete E5a Galileo and E1 Galileo frequencies. Modify “L1/E1” to “B1C” and “L5/E5a” to “B2a” in the full text.

5. Delete the note under the table in 2.2.1.

6. Modify “ 1dB Input Compression Point” of 1149.45MHz to “-2dbm”, and modify “ 1dB Input Compression Point” of 1200.45MHz to

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“-2dbm” while other frequency points remain unchanged in 2.2.6.3 Boresight Transducer Gain Compression Point.

7. Modify “Relative Frequency Response” of 1149.45MHz to “-20dB”, and modify “Relative Frequency Response” of 1200.45MHz to “-20dB” while other frequency points remain unchanged in 2.2.8 Boresight Gain Relative Frequency Response.

8. Delete the Group Delay Versus Aspect Angle requirements in 2.2.11.2.

9. Delete “2.2.11.2” from “Insert the delay values in the appropriate limit formula in Section 2.2.11 and verify that the requirements of Sub-sections 2.2.11.1 and 2.2.11.2 are met.” in 2.4.2.2.6.

10.In Table 2-7 of 2.4.2.6.2, modify the “RF Peak Field” value of 1149.45MHz to “6.65”, modify the “RF Peak Field” value of 1200.45MHz to “6.9”.

11.Delete item 2 of note in 2.4.2.4.

(The English version is for reference only. In case of any discrepancy or ambiguity of meaning between this English translation and the Chinese version, the latter shall prevail.)