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PRN Code Assignment Process V3.1 (National Executive Committee for Space-Based PNT)

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Executive Summary

The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides

reliable positioning, navigation, and timing services to civilian users on a continuous worldwide

basis—freely available to all. The United States Air Force (USAF) is the executive agent of GPS

and is directly responsible for acquiring, operating, and sustaining survivable, effective, and

affordable global positioning services for its worldwide customers. The Space and Missile Systems

Center (SMC), Air Force Space Command (AFSPC), is responsible for developing, procuring, and

sustaining GPS satellites, ground systems, and military user equipment.

With the advent of Satellite Base Augmentation Systems (SBAS) and other Radionavigation

Satellite Service (RNSS) systems, managing the issuance and use of GPS pseudorandom noise

(PRN) codes to minimize intra- and inter-system interference has become critical. The GPS PRN

Coordination Office (PRNCO), an entity within the Space and Missile Systems Center (SMC)

located in Los Angeles, CA, is responsible for managing the issuance of GPS PRN codes.

This GPS PRN Code Assignment Process document describes the process for requesting and

assigning the GPS PRN codes pre-selected and defined in GPS interface specifications IS-GPS-

200, IS-GPS-705, and IS-GPS-800. The objectives of this PRN code assignment process are (1)

to establish PRNCO as the single focal point for L1, L2, and L5 GPS PRN code assignments; (2)

to prevent multiple assignments of the same PRN code sets; (3) to assign PRN codes that assure

compatibility and interoperability; and (4) to assign PRN codes in a transparent and equitable

manner.

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Table of Contents

Executive Summary ........................................................................................................................ 2

1. Pseudorandom Noise (PRN) Code Assignment Background ...................................................... 3

2. Process Overview ........................................................................................................................ 4

3. Request for PRN Code Assignment ............................................................................................ 5

4. Review of PRN Code Assignment Application........................................................................... 5

5. Retention of PRN Code Assignment ........................................................................................... 9

6. Modification of PRN Code Assignment .................................................................................... 10

7. GPS PRN Coordination Office Contact Information ................................................................ 10

Appendix A: Application for PRN Code Assignment .................................................................. 11

1. Pseudorandom Noise (PRN) Code Assignment Background

1.1. Intro. Many national and international radionavigation systems seek a high level of

interoperability with GPS, including the use of PRN codes from the spreading code families

developed for GPS. Signals that employ PRN codes from the GPS spreading code families

achieve an established level of code performance, including compatibility and

interoperability with GPS. Additionally, the use of PRN codes from the GPS spreading code

families fosters the development of receivers capable of seamlessly using signals from

multiple radionavigation systems. The resulting compatibility and interoperability are

beneficial to all systems using GPS PRN codes.

1.2. Scope. The procedures established in this document apply to systems other than GPS, for

example Space-Based Augmentation Systems (SBAS), planning to transmit GPS

augmentation signals using one or more of the following PRN codes: L1 Coarse/Acquisition

(C/A)-code, L2 Civil-Moderate (L2 CM)-code, L2 Civil-Long (L2 CL)-code, L5 In-Phase

(L5 I5)-code, L5 Quadrature-Phase (L5 Q5)-code, L1 Civil-Pilot (L1C

), and L1 Civil-Data

(L1C

) as defined in IS-GPS-200, IS-GPS-705, and IS-GPS-800. While this process is most

commonly used by SBAS providers, this application process should also be followed by

other applicants.

1.3. PRN Definitions. The GPS Pseudorandom Noise spreading codes are defined in IS-GPS-

200, IS-GPS-705, and IS-GPS-800. Baseline sets of PRN codes are reserved exclusively for

use by GPS satellites. Additional sets of PRN codes are defined for use by cooperating

radionavigation systems. A PRN code set consists of a matching quadruplet of distinct PRN

codes for each of the GPS L1, L2, and L5 civil signals defined in the previously listed

interface specifications. See Table 1 for a summary of the various PRN allocations.

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Table 1. PRN Codes and Associated PRN Applications

PRN Code PRN Code Application

L1 C/A

1 – 63

Reserved (GPS)

64 – 119

Other Augmentation Systems

120 – 138*

Satellite-Based Augmentation Systems (SBASs)

139 – 158*

SBASs Expansion/Testing

159 – 210

Other Global Navigation Satellite System (GNSS) Elements

& Applications

L1C

1 – 63

Reserved (GPS)

64 – 119

Other Augmentation Systems

120 – 158*

SBASs

159 – 210

Other GNSS Elements & Applications

L2C

1 – 63

Reserved (GPS)

64 – 119

Unallocated

120 – 158*

SBASs

159 – 210

Other GNSS Elements & Applications

1 – 63

Reserved (GPS)

64 – 119

Unallocated

120 – 158*

SBASs

159 – 210

Other GNSS Element & Applications

* See Section 4.3.7 for SBAS-specific guidance

2. Process Overview

2.1. Overview. A formal request for a PRN code is initiated when an applicant submits the

“Application for PRN Code Set Assignment” to PRNCO (smc.gp.prn@us.af.mil). If the

review criteria in Sections 4.3 and 4.4 are satisfied and PRN codes are available, PRNCO

will issue a PRN code set assignment to the applicant. All four civil signals, i.e. L1-C/A,

L1C, L2C, L5, with the matching PRN code numbers will be assigned at the same time;

unused signals will be held by PRNCO as “reserved” portions of the assignment. The

assignment duration will be based on the needs of the subject system and the criteria

described in Section 4.4. The applicant may renew the assigned PRN code set by resubmitting

an application with any relevant changes.

2.2. Website. Pertinent documentation, to include this process, the lists of assigned and available

PRN code sets, and the “Application for PRN Code Assignment” is located on the GPS PRN

Code Assignment Website at http://www.losangeles.af.mil/About-Us/Fact-

Sheets/Article/343695/pseudorandom-noise-code-assignments.

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3. Request for PRN Code Assignment

3.1. Application Submittal. To request the initial assignment or renewal of one or more PRN

code sets, an applicant must fill out the “Application for PRN Code Assignment” form found

on the GPS PRN Code Assignment Website and included in Appendix A of this document.

Once the application is complete, the applicant should email the application to PRNCO per

the instructions described on the application. Thorough completion of the application and

compliance with the instructions will aid PRNCO review.

3.2. Application Content. The purpose of the application is for PRNCO to obtain sufficient

technical and programmatic information about the subject system to review and assign the

appropriate PRN code set and duration. This decision is influenced by both the applicant’s

request and PRNCO’s evaluation of the application according to the criteria in Section 4.2.

3.3. Timeline for Submittal. Informal coordination (e.g. email or in-person communication) on

the status of the applicant’s program, intentions for PRN code assignment renewal, or

intentions to apply for a new PRN code set can be conducted at any time. However, formal

application submittal should be accomplished between 1 year and 4 months prior to the

desired PRN assignment notification date (Note: PRN assignment notification date is the

date of issuance, not the date of system broadcast).

4. Review of PRN Code Assignment Application

4.1. Receipt and Clarifying Questions. PRNCO will normally reply within 3 weeks of

application submittal to confirm receipt of the PRN Code Assignment Application. If no

confirmation of receipt is received during that time, PRNCO recommends forwarding the

application to the alternate focal points (See Section 7). After receipt, PRNCO will contact

the applicant to ask clarifying questions to effectively complete the review, if necessary.

4.2. Timeline for Review. PRNCO will review applications as quickly as possible, in the order

they were received. If the application is complete, an adjudication can be expected within 2

months after confirmation of receipt. Applicants should specify the PRN code notification

need date on the application.

4.3. PRN Code Determination. The following factors are used to determine whether or not a

PRN code will be assigned, as well as which PRN code will be assigned to the applicant.

4.3.1. Compatibility and Interference. PRNCO will conduct initial compatibility and

interference screening, to include verifying the transmitter characteristics are in compliance

with International Telecommunication Union (ITU) Radio Regulations, ensuring the PRN

code is not currently in use, and reviewing compliance with any existing GPS operator-to-

operator agreements.

4.3.2. Demonstrated Compliance to Governing Spectrum Authorities. The applicant (i.e. the

organization or government administration either operating the subject system or acting as

the SBAS service provider), is responsible for ensuring the transmitting system complies

with all required radio frequency filings. These may include filings with the ITU, the

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appropriate national spectrum regulatory agency, and other authorities as required. The

specific frequency assignment process, ITU operator-to-operator coordination process, and

radiation approval process are beyond the scope of this document.

In the case of SBASs transmitting from leased payloads, the SBAS service provider may not

necessarily be the organization that submits the radio frequency filings, but the burden is on

the service provider to ensure the appropriate filings are complete, accurate, and approved

before the SBAS transmits with a PRN code.

Assignments will not be processed until proper documentation including, but not limited

to, proof of submitted fillings with both international and national regulatory bodies has

been provided.

4.3.3. Requested PRN code. If the other review criteria in Sections 4.3 and 4.4 are satisfied,

PRNCO will attempt to issue the requested PRN code if it is available. When the requested

PRN code is unavailable, PRNCO will attempt to issue a PRN code within the same range of

PRNs. For example, if PRN 125 is requested but unavailable, PRNCO will attempt to issue

another PRN within the legacy PRN range of 120-138.

4.3.4. Existing PRN Code Assignment. If a specific PRN code is requested by multiple applicants,

and all other review criteria are satisfied, priority will be given to the applicant who already

possesses a PRN code assignment for that specific code (e.g. if an applicant possesses a

Temporary assignment for PRN 137 and decides to apply for renewal of the Temporary

assignment or conversion to a Final assignment for PRN 137).

4.3.5. Quantity of PRN Codes Already Assigned. Due to limited PRN codes and increasing

numbers of systems requiring PRNs, the number of PRNs assigned to an applicant must be

managed to ensure the assignment process is equitable. For SBAS PRNs, PRNCO will issue

no more than 3 PRN code assignments within the range PRN 120-158 to a single SBAS

provider unless there are extenuating circumstances.

4.3.6. Type of PRN code. There are two types of PRN code assignments: Temporary and Final.

4.3.6.1. Final. The maximum duration of a Final PRN code assignment is 10 years. PRN

assignments will be identified as Final if the following two requirements are met:

A) The subject system must be operational. Either the orbital position of the

existing operational satellite or evidence of completed operational testing must

be provided.

B) Evidence of the subject system’s spectrum certification through the ITU and/or

other appropriate regulatory agency must be provided.

4.3.6.2. Temporary. The maximum duration of a Temporary PRN code assignment is 3

years. Temporary assignments will be issued for systems that do not meet the

requirements for a Final assignment. Developmental systems, for example systems

undergoing testing or proof-of-concept demonstration, may be eligible for

Temporary assignments. While final spectrum certifications are not required,

evidence of appropriate spectrum filing submission through the ITU and/or other

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appropriate regulatory agency must be provided. Applicants desiring to upgrade a

Temporary assignment to a Final assignment must submit a new application; the subject

system will be eligible for the full 10 year Final assignment duration, regardless of the

Temporary assigment duration.

4.3.7. SBAS Considerations (PRNs 120-158). If the applicant is requesting PRNs (120-158), for

use by International Civil Aviation Organization (ICAO) International Standards and

Recommended Practices (SARPs)-compliant SBAS, adherence to the following

requirements will influence whether or not a PRN can be issued. The following factors will

be considered for all SBAS PRN code assignments:

4.3.7.1. Users. Assessment of the operational users and geographic area serviced by the

subject system. In the event of limited operational PRNs, the number of operational

users and geographic area may be considered to determine whether a particular PRN

code is assigned.

4.3.7.2. Coordination. The SBAS provider must supply evidence of successful or planned

coordination with other systems transmitting in the same band as the subject

system, that is the 1559-1610 MHz and/or 1164-1300 MHz bands.

4.3.7.3. Program Updates. SBAS service providers are expected – at a minimum – to

submit information papers to the ICAO Navigation Systems Panel (NSP) that

describe the high-level development, implementation, and operational timeline of

their SBAS system. Specific milestones should clearly indicate the expected date

when PRNs are required for development and testing as well as the expected PRN

need date for operational use of RTCA DO-229 Minimum Operational

Performance Standards (MOPS) compliant SBAS avionics. The applicant must

provide a copy of these information papers to PRNCO to establish credible intent

to make use of the PRN code assignment.

4.3.7.4. Legacy PRN Considerations (PRNs 120-138). Due to the proliferation of SBASs

designed for safety-of-life aviation use in accordance with Annex 10 Volume 1 of

the Convention on International Civil Aviation, the original allocation of SBAS

PRNs (120-138) does not meet the demand of current and planned systems. While

PRN code numbers 139-158 are currently allocated for SBAS use, updates to all

civil aviation standards and guidance (e.g. ICAO SARPs, RTCA/EUROCAE

MOPS, etc.) were not effective until May 2017. Therefore, aircraft equipped with

the full 120-158 range are not expected to appear in great numbers for some time.

The following will be considered for issuance of a legacy PRN:

A) The Civil Aviation Authority (CAA) is expected to submit a Letter of

Confirmation to both the ICAO NSP and PRNCO certifying that the SBAS

provider’s service will be in compliance with the ICAO SARPs. The Letter

of Confirmation should also state the expected date of initial SBAS

operational use.

Note: The requesting or endorsing CAA may reside in a different state from

where the SBAS provider is licensed in accordance with respective national

regulations.

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B) Preference will be given to subject systems that have met the requirements for

a Final PRN code assignment, as described in Section 4.3.6.1.

In order to support the future expansion of internationally harmonized SBAS PRN

codes, PRNCO strongly recommends use of PRNs 139-158 by applicants with

subject systems that fall under the criteria for Temporary assignments, i.e.

research, development and testing applications.

4.4. Duration of PRN Code Assignment

4.4.1. Maximum Duration. The maximum duration of the PRN code assignment depends on the

type of PRN code assignment. If it is Temporary, the maximum duration is 3 years. If it is

Final, the maximum duration is 10 years. An applicant desiring to extend a PRN code

assignment beyond the maximum duration must renew their assignment by submitting

another application, incorporating any pertinent changes.

4.4.2. Assigned Duration. The assigned duration will depend on two factors:

4.4.2.1. Requested Duration. PRNCO will attempt to accommodate the requested

duration if it aligns with the submitted program timeline.

4.4.2.2. Program Schedule. The applicant is required to submit a program schedule that

includes the high level development, implementation, and operation timeline,

including when the PRN codes will be required. Plans to decommission the system

or field a new system, or any other change expected that would affect the

operational status of the system must be included. The alignment of the program

schedule with the requested duration will be considered in the determination of

assignment duration.

4.5. Issuance of PRN Code Assignment. If the review criteria are satisfied, PRNCO will issue

a PRN code assignment letter to the applicant.

4.5.1. Issuance of PRN Code Set. When PRNCO issues a PRN code, the entire PRN code set

with matching codes for the L1 C/A, L1C, L2C, and L5 signals will be assigned to the

applicant at the same time. Any of the four civil signals not requested by the applicant will

be held by PRNCO as “reserved.”

4.5.2. Assignee. The applicant or requesting agency will be the recipient of the PRN code

assignment. The desired addressee for the assignment letter should be included in the

Application for PRN Code Assignment. In the case of SBASs transmitting from leased

payloads, PRN codes are assigned to the government administration acting as the SBAS

service provider, not to the owner of the satellite that hosts the leased payload.

4.5.3. Published Update. PRNCO will publish updates to the L1 C/A, L1C, L2C, and/or L5 PRN

Code Assignment Tables on the GPS PRN Website at http://www.losangeles.af.mil/About-

Us/Fact-Sheets/Article/343695/pseudorandom-noise-code-assignments.

4.5.4. Disclaimer. Issuance of a PRN code does not indicate the PRNCO, Space and Missile

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Systems Center (SMC), or United States Air Force endorses or approves of the subject

system’s operations. A PRN code assignment does not convey the authority to radiate in

the L1, L2, or L5 frequency bands. SMC assumes no responsibility for ensuring subject

systems comply with domestic or international radio frequency regulations or ensuring

subject systems do not cause RF interference. The applicant and appropriate national and/or

international regulatory bodies are responsible for the operation of the subject system in

accordance with all applicable rules and regulations.

4.5.5. Expiration. The PRN code assignment will expire the last day of the last month of the

effective assignment. For example, if the PRN code assignment is effective thru April 2023,

it will expire on 30 Apr 2023.

5. Retention of PRN Code Assignment

In order to retain the issued PRN code assignment, the applicant must adhere to the following

requirements:

5.1. Program Update. Applicants must notify PRNCO when the program timeline (as described

in Section 4.4.2.2) or planned PRN code requirements have changed with respect to the

original application package.

5.2. Filing Status Update. Applicants must notify PRNCO when the status of spectrum filings

to pertinent domestic/international spectrum authorities has changed.

5.3. SBAS Specific Requirements

5.3.1. Maintaining Operations. For SBAS PRN code assignments designated as Final, the

subject system cannot lapse in operation for more than 2 consecutive years during the

assigned duration. In order to meet this requirement, providers have the option of transfering

the PRN (Section 6.3) to another existing operational system or a newly fielded system.

Other options should be discussed and coordinated with PRNCO.

5.3.2. ICAO NSP Updates. Applicants must continue to update NSP as described in Section

4.3.7.3.

5.3.3. Compliance to Civil Aviation Standards. Subject systems must remain compliant with

civil aviation standards and guidance, including but not limited to ICAO SARPs.

5.3.4. Non-safety-of-life SBAS. If the SBAS is not approved for safety-of-life services, the

SBAS provider must implement protective measures to ensure transmissions are not

erroneously used for safety-of-life services. This includes, but is not limited to, transmitting

messages of Type 0.

5.3.5. Issue or Anomaly Reporting. In the event that an issue or anomaly is identified with an

SBAS system, the SBAS provider should be notified directly. PRNCO should be included

on the correspondence. The SBAS provider contact sheet and process for anomaly reporting

are located on the ICAO NSP portal.

5.3.6. Impact to Safety-of-life Services. The SBAS provider must cease transmission (Section

6.4) of the assigned PRN if it is determined by any ICAO or RTCA/EUROCAE member

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that the system’s transmissions impact SBAS safety of life services. Also see Section 6.1

on suspension and revocation.

6. Modification of PRN Code Assignment

6.1. SMC/GP PRN Transfer. PRNCO reserves the right to transfer PRNs, that is assign a

different PRN code than the original, while it is still active. In the case of a transfer, PRNCO

will notify all affected parties and work with them to coordinate the logistics of the

reassignment.

6.2. Revocation or Suspension. PRNCO reserves the right to revoke or suspend any active PRN

code assignment if: (1) The subject system is found to not be in compliance with

international or national regulations, standards, or guidance, (2) the subject system does not

meet the criteria for its assigned PRN code as discussed in Section 5, e.g. system ceases to

be operational, or (3) the applicant is not using its PRN code assignment. PRNCO will

attempt to discuss any issues with the applicant before revoking or suspending the PRN code

assignment.

6.3. Advanced Notice Requirement. PRNCO will not make any modifications to SBAS PRN

code assignments that impact an SBAS service provider's obligation to "provide ICAO with

six years notice in advance of planned system termination" without first discussing this

decision at a meeting of the ICAO NSP.

6.4. Assignee PRN Transfer. Assignees may transfer PRN code number assignments between

satellites within their systems as long as the service providers give PRNCO at least one

month advance notice. For example, an SBAS service provider may transfer one of its two

PRN code assignments to a third satellite while one of the primary satellites is undergoing

maintenance (information in Part 2 of the PRN Code Assignment Application must provided

for the third satellite).

6.5. Cease of Transmissions. When a subject system ceases to transmit the assigned PRN due

to an expiration, transfer, revocation, or suspension, the provider must email PRNCO to

announce that the system has ceased transmission.

7. GPS PRN Coordination Office Contact Information

Below is the primary contact for GPS PRNs:

PRNCO Org Box: smc.gp.prn@us.af.mil

All applications and questions, or concerns about GPS PRN codes should be submitted to the

PRNCO Org Box. The following alternate contacts should be used as contingency, including

for time sensitive requests:

Jeffrey Auerbach: AuerbachJM@state.gov

Karl Kovach: karl.l.kovach@aero.org

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Appendix A: Application for PRN Code Assignment

To initiate the PRN code assignment process, an applicant must (1) fill out the “Application for

PRN Code Assignment” located on the GPS PRN Website (http://www.losangeles.af.mil/About-

Us/Fact-Sheets/Article/343695/pseudorandom-noise-code-assignments) and (2) email the

completed application to PRNCO at smc.gp.prn@us.af.mil.

Below is the latest application (Version 3.1) completed with sample text. Note: The electronic

version should be used for submissions.

APPLICATION FOR PRN CODE ASSIGNMENT

Part 1

INSTRUCTIONS

Complete application and submit via email to smc.gp.prn@us.af.mil. Attach supporting documentation to the email. The GPS PRN

Coordination Office will confirm receipt of application within 3 weeks. If no response is received, use the alternate contact

information in the PRN Code Assignment Process. Completeness of application information will expedite the review process.

Alternate Address: GPS PRN Coordination Office, PNT Mission Integration, 483 North Aviation Blvd, El Segundo, CA 90245-4659, USA

2. FAMILY NAME

3. MIDDLE NAME

5. ORGANIZATION

7. FAX

8. E-MAIL(S)

APPLICANT INFORMATION

1. FIRST NAME

4. TITLE

6. TELEPHONE

ATTN

Street

City, State, Zip Code

Country

9b. ASSIGNMENT LETTER RECIPIENT ADDRESS

ATTN

Street

City, State, Zip Code

Country

SYSTEM INFORMATION

10. SYSTEM NAME

12. SPONSORING GOVERNMENT

13. ORGANIZATION/DEPARTMENT

11. SBAS Provider ID (or N/A)

14. ITU (or regulatory agency)

FILING DATE (actual/anticipated)

PRN CODE REQUEST INFORMATION

Please fill out the following info for each PRN code set requested.

15. DATE OF APPLICATION

16a.

Requested

PRN Code

16b.

Signals

16c.

Satellite Name

16d.

GLAN

(degrees)

*if GEO

16e.

Notification

Need Date

16f.

Test Broadcast Dates

16g.

Operational Service

Broadcast Dates

16h.

Requested

Expiration

Start End Start End

17. JUSTIFICATION FOR REQUEST. Please explain here or attach supplemental information to support the PRN request, if applicable.

18. USERS. Please explain who the users of this service will be (geographical region and/or consituents).

19. OTHER COMMENTS/SPECIAL REQUESTS

GEO – Geosynchronous

GLAN – Geographic Longitude of the Ascending Node

ITU – International Telecommunications Union

PRN – Pseudorandom Noise

SBAS – Satellite Based Augmentation System

CONTINUE TO NEXT PAGE (PART 2). COMPLETE PART 2 FOR EACH BROADCASTING SATELLITE.

Version 3.1

9a. APPLICANT ADDRESS

120

L1, L5

Satellite 4F2

50 W

Apr 2019

Mar 2019

Apr 2019

May 2019

139-158

L1, L5

Satellite 4F3

50 E

Apr 2019

Mar 2019

Apr 2019

N/A

Apr 2019

John

Smith

Director of Navigation

Civil Aviation Administration

+1-000-000-000

email@org.edu

Example Augmentation System

United States of America

Applicant Address, Org

123 Street

City, State, 22000

USA

Civil Aviation Administration

14 Jan 2019

20 Feb 2019

PRN 120 needed for operational broadcast. Need PRN assignment no later than Apr 2019 for planning purposes. An additional PRN is requested in the range 139-158 for

testing. See attached documents for program timeline and regulatory body certifications.

The operational Satellite 4F2 will provide safety-of-life SBAS service to aircraft in Northern Africa beginning in 2020.

PRN 120 was assigned 10 years ago in Apr 2009. We are requesting to renew PRN 120 and use it for a different satellite.

Assignment Letter Recipient, Org

123 Street

City, State, 22000

USA

APPLICATION FOR PRN CODE ASSIGNMENT

Part 2

INSTRUCTIONS

Complete this page for each broadcasting satellite. Ensure to designate broadcasted PRN Code(s) in 17a for identification.

SATELLITE ORBIT PARAMETERS

Please fill out the following info for each satellite

20a. PRN Code(s) Broadcasted

20b. GLAN (degrees) *GEO only* 20c. SEMI-MAJOR AXIS, SMA (meters)

20d. RAAN (degrees) 20e. INCLINATION, i (degrees)

20f. ARGUMENT OF PERIGEE (degrees) 20g. ECCENTRICITY, e

20h. MEAN ANOMALY (degrees) 20i. UTC TIME OF EPOCH

RECEIVED ISOTROPIC POWER (RIP)

21. MAXIMUM RIP ON SURFACE OF EARTH (dBW)

21a. L1 C/A

21b. L1 Cp

21c. L1 Cd

21d. L2 CL

21e. L2 CM

21f. L5 I5

21g. L5 Q5

22. RIP ON SURFACE OF EARTH AS A FUNCTION OF ELEVATION

Please provide RIP for each applicable signal in dBW

Elevation

(degrees)

-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90

L1 C/A

L1 Cp

L1 Cd

L2 CL

L2 CM

L5 I5

L5 Q5

23. RIP REMARKS

ADDITIONAL INFORMATION FOR TEST SATELLITES

24a. POWER LEVELS AND MODE OF OPERATIONS

Effective Isotropic Radiated Power, dBW

24b. TRANSMIT ANTENNA GAIN PATTERN

25. PULSED MODE

25a. PULSE DUTY CYCLE 25b. PULSE REPITITION RATE

26. INTERFERENCE ANALYSIS

Describe measures taken to avoid interference and details of interference analysis done

GEO – Geosynchronous

GLAN – Geographic Longitude of the Ascending Node

PRN – Pseudorandom Noise

RAAN – Right Ascension of the Ascending Node

SBAS – Satellite Based Augmentation System

UTC – Universal Coordinate Time

Version 3.1

N/A

Remarks

120

20 000 890

0.1

0.0

MMDDYY HH:MM:SS

50 W

270

0.0

220

-150.4

N/A

-150.2

N/A

-150.4

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-150.4

Explanation of power levels (dBW) and mode of operations

Details on antenna gain pattern

Explanation of measures taken

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PRN Code Assignment Process V3.1 (National Executive Committee for Space-Based PNT)

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