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IS-GPS-705J 本文档是关于 Navstar GPS Space Segment 和 User Segment L5 接口的技术规范文档。该文档指定了技术要求，并且明确声明这些要求不会改变任何合同或采购订单之间的条款。文档结构： 1. Authority Description Date：该部分指定了文档的发布日期和版本号。 2. Approval：该部分列出了文档的作者、审查员和签名人。 3. INTERFACE SPECIFICATION DOCUMENT：该部分是文档的主体部分，指定了 Navstar GPS Space Segment 和 User Segment L5 接口的技术要求。 4. Revision Record：该部分记录了文档的修订历史，包括修订日期、描述和批准日期。技术要求： 1. 数值表示：除非另有说明，所有数字都以十进制形式表示。 2. 接口规范：该文档指定了 Navstar GPS Space Segment 和 User Segment L5 接口的技术要求，包括信号-in-space 更新、公共导航数据、伪随机噪声（PRN）扩展、用户范围精度（URA）定义、civil 导航数据、伪距参数等。 3. 接口控制_contractor：SAIC（GPS SE&I）是本文档的接口控制Contractor。 4. 批准签名：PNT Technical Director, MilComm & PNT Directorate, Space Systems Command (SSC) 是本文档的批准签名人。修订记录：该文档的修订记录显示了从 2003 年 11 月 24 日到 2022 年 8 月 1 日的修订历史，包括修订的原因、日期和批准人。本文档是 Navstar GPS Space Segment 和 User Segment L5 接口的技术规范文档，指定了技术要求和修订记录，为GPS系统的开发和实施提供了重要的技术参考。

AUTHORITY

DESCRIPTION

DATE

RFC-00467

Incorporation of IRN-IS-705H-001

01-AUG-2022

DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited.

APPROVALS

Authored By: RE Tony Anthony Checked By: RE Vincent Quan

AUTHORIZED SIGNATURES

REPRESENTING

DATE

PNT Technical Director, MilComm & PNT

Directorate, Space Systems Command (SSC)

INTERFACE SPECIFICATION DOCUMENT

UNLESS OTHERWISE SPECIFIED, NUMBERS ARE

REPRESENTED IN DECIMAL FORM.

Interface Control Contractor:

SAIC (GPS SE&I)

200 N. Pacific Coast Highway, Suite 1800

El Segundo, CA 90245

TITLE:

Navstar GPS Space Segment/ User Segment L5 Interfaces

THIS DOCUMENT SPECIFIES TECHNICAL

REQUIREMENTS AND NOTHING HEREIN

CONTAINED SHALL BE DEEMED TO ALTER THE

TERMS OF ANY CONTRACT OR PURCHASE

ORDER BETWEEN ALL PARTIES AFFECTED

SIZE A

CODE IDENT

66RP1

NO.

IS-GPS-705

SCALE: N/A

REV: J

IS-GPS-705J

01-AUG-2022

iii

TABLE OF CONTENTS

1 INTRODUCTION ............................................................................................................................................... 1

1.1 Scope ............................................................................................................................................................. 1

1.2 IS Approval and Changes ............................................................................................................................. 1

2 APPLICABLE DOCUMENTS ........................................................................................................................... 2

2.1 Government Documents ............................................................................................................................... 2

2.2 Non-Government Documents ....................................................................................................................... 2

3 REQUIREMENTS ............................................................................................................................................... 4

3.1 Interface Definition ....................................................................................................................................... 4

3.2 Interface Identification .................................................................................................................................. 5

3.2.1 Ranging Codes ....................................................................................................................................... 5

3.2.1.1 L5-Codes ......................................................................................................................................... 5

3.2.1.2 Non-Standard Codes ....................................................................................................................... 5

3.2.2 L5 CNAV Data ...................................................................................................................................... 6

3.2.3 L5 Signal Structure ................................................................................................................................ 8

3.3 Interface Criteria ........................................................................................................................................... 9

3.3.1 Composite Signal ................................................................................................................................... 9

3.3.1.1 Frequency Plan................................................................................................................................ 9

3.3.1.2 Correlation Loss .............................................................................................................................. 9

3.3.1.3 Carrier Phase Noise......................................................................................................................... 9

3.3.1.4 Spurious Transmissions .................................................................................................................. 9

3.3.1.5 Phase Quadrature .......................................................................................................................... 10

3.3.1.6 Signal Power Levels ..................................................................................................................... 10

3.3.1.6.1 Space Service Volume (SSV) Received Signal Power Levels .............................................. 11

3.3.1.7 Equipment Group Delay ............................................................................................................... 11

3.3.1.7.1 Group Delay Uncertainty ....................................................................................................... 11

3.3.1.7.2 Group Delay Differential ....................................................................................................... 12

3.3.1.7.3 Space Service Volume Group Delay Differential .................................................................. 12

3.3.1.8 Signal Coherence .......................................................................................................................... 12

3.3.1.9 Signal Polarization ........................................................................................................................ 12

IS-GPS-705J

01-AUG-2022

3.3.2 PRN Code Characteristics.................................................................................................................... 12

3.3.2.1 Code Structure .............................................................................................................................. 13

3.3.2.2 Code Generation ........................................................................................................................... 14

3.3.2.3 Q5 Synchronization Sequence ...................................................................................................... 17

3.3.3 Navigation Data ................................................................................................................................... 17

3.3.3.1 Navigation Data Modulation......................................................................................................... 17

3.3.3.1.1 Forward Error Correction ...................................................................................................... 17

3.3.3.1.2 Neuman-Hofman Code .......................................................................................................... 18

3.3.4 GPS Time and SV Z-Count ................................................................................................................. 19

4 NOT APPLICABLE .......................................................................................................................................... 21

5 NOT APPLICABLE .......................................................................................................................................... 21

6 NOTES ............................................................................................................................................................... 22

6.1 Acronyms .................................................................................................................................................... 22

6.2 Definitions................................................................................................................................................... 24

6.2.1 User Range Accuracy .......................................................................................................................... 24

6.2.2 SV Block Definitions ........................................................................................................................... 24

6.2.2.1 Developmental SVs ...................................................................................................................... 24

6.2.2.2 Operational SVs ............................................................................................................................ 24

6.2.2.2.1 Block II SVs (Decommissioned) ........................................................................................... 25

6.2.2.2.2 Block IIA SVs (Decommissioned) ........................................................................................ 25

6.2.2.2.3 Block IIR SVs ........................................................................................................................ 25

6.2.2.2.4 Block IIR-M SVs ................................................................................................................... 25

6.2.2.2.5 Block IIF SVs ........................................................................................................................ 25

6.2.2.2.6 GPS III SVs............................................................................................................................ 25

6.2.2.2.7 GPS IIIF SVs ......................................................................................................................... 25

6.2.3 Operational Interval Definitions .......................................................................................................... 25

6.2.4 GPS Week Number .............................................................................................................................. 25

6.2.5 Reserved Data ...................................................................................................................................... 25

6.2.6 Valid Range ......................................................................................................................................... 25

6.2.7 Invalid Range ....................................................................................................................................... 26