GLONASS STATUS

ROSCOSMOS STATE SPACE CORPORATIONIVAN REVNIYKH

February 13, 2024

GLONASS SPACE SEGMENT STATUS
updated 12.02.2024
730

1703
743

707
761

8760

16
10747
757

7732

752

6

412754

24705

19706

14759

18

25

III
11744

751

23

II
3

17723

15I
733

702

82745

9720

22758

20719
8

21756

5721

26 MEO satellites
24

2

operational

commissioning

13755

21

GLONASS-М batch

21

GLONASS-K batch

4

GLONASS-K2 batch

1

availability

99,99%

The constellation provides
continuous global PNT service2

GLONASS CIVIL SERVICES
Basic Service

Service of Improved
Reliability and Accuracy

Relative Navigation Service

High-Accuracy Service

Infrastructure
GLONASS• System for Differential Correction andMonitoring/SDCM (SBAS)• GBAS stations

Distributed network of base
RTK-stations

System for High-Precision Definition ofEphemeris and Clock Corrections basedon the analogue of PPP technology

Operational

Operational

Local service areas in Russia

RussiaStatusOperational

Pre-operational (SBAS)
Operational (GBAS)

Service Area
Global (including up to 2000 km
altitude of space volume)

RussiaBroadcast Channels
24 GLONASS satellites• L1OF, L2OF open signals• L1OC, L2OC, L3OC open
signals as pre-operational• 2 LUCH GEO relay satellites (L1)
• SISNET (access via Internet)• ground HF & UHF radio channels ofGBAS stations (coverage radiusup to 200 km)• ground radio channels of basestations (coverage radius upto 30 km)• Internet (access to post-processinginformation)

Internet, including mobile
communications

Provided information• Ephemeris and timinginformation• Global ionospheric model(L1OC, L3OC)• Real-time corrections for
GLONASS & GPS• Integrity information• Ionospheric corrections (VTEC)

Assistive real-time andpost-processing OSR information(precise station coordinates, codeand phase observations)

Precise absolute orbit & clock (SSR)
real-time and post-processingcorrections for all GNSS

3

GLONASS SATELLITESThe launch of GLONASS-K2 satellite in August 2023

The first GLONASS-K2
satellite wassuccessfully launchedon August 7, 2023

GLONASS-M

GLONASS-K

GLONASS-K2

The numberof satellites

2141

Inter-Satellite
Links-++Clocks

Cs

Cs, RbH-maser, Cs, Rb

Open FDMA
L1OF & L2OF

2141Open CDMAsignal L3OC

741Open СDMA
L1OC & L2OC--1

COSPAS-SARSAT
payload-31Laser
Retroreflectors

21414

HIGH-ORBIT GLONASS SPACE COMPLEX
Planned Architecture
Ground tracks of satellites

At least 6 satellites ininclined geosynchronous
orbits in 3 orbital planes
Orbit altitudes

64.8°
42 164.142 km

Orbital period

86 164 s

Eccentricity• Contribution to the provision of GLONASS
High-Accuracy Service by the broadcast ofL3SVI open signal transmitting PPP
corrections for all GNSS and integrity
service information

Planned to be launchedfrom the new Russian
Vostochny spaceport

0.072

Contribution to GLONASS Services• Contribution to the provision of GLONASS
Basic (PNT) Service by the broadcast ofL1OC & L2OC open signals as acomplement to GLONASS MEO
constellation for better satellite (signal)
geometry

Soyuz-2 family

34 000 – 38 000 km

Orbital inclination
Semi-major axis

Launch vehicles:

Planned Results> 25ºEnhanced availability in difficult
conditions for signal reception(elevation > 25°) by 15%

Extended coverage zone andincreased availability of GLONASS
High-Accuracy Service

Increased availability in highlatitudes, including Artic region

More reliable GLONASS HighAccuracy Service due to integrity

Improved PDOP leads to 25%
accuracy improvementin the Eastern hemisphere

Ionospheric activity compensationin high latitudes with global
ionospheric model in L1OC5GLONASS HIGH-ACCURACY SERVICE
Expected GLONASS L3SVI signal (1202.025 MHz)
coverage based on LUCH GEO relay satellites

Current Status

Further Development

Infrastructure
59 measurement stationsof Roscosmos network

80 measurement stations of Roscosmos network

Corrections

16W
LUCH

95E
LUCH

167E
LUCH

Absolute real-time &post-processing
orbit & clock
corrections for all GNSS

• Absolute real-time & post-processing orbit & clock
corrections for all GNSS
• Code & phase biases + yaw-attitude models• Ionospheric & tropospheric models (for users in Russia andsurrounding territories)

Service Area
GLONASS High-Accuracy Service accuracy (m)0.2

latitude

0.15
0.1

longitude

0.05
0altitude

RussiaBroadcast Channels
Internet, including mobilecommunications(corrections for allGNSS)

-0.05
-0.1

Message Format

-0.15

RTCM

Static accuracy in 3 dimensions based on GLONASS + GPS +GLONASS High-Accuracy Service real-time solution is within 25 cm(NPK SPP assessments, January 10-11, 2024)

Limitedly global (all continents except North America andAntarctica)• Internet (corrections for all GNSS)• L3SVI signal broadcast by 3 new LUCH GEO relay& 2 other GEO satellites (corrections for GLONASS & GPS)
• L3SVI signal broadcast by High-Orbit GLONASS satellites(corrections for all GNSS + integrity information)

Analogue of CSSR (for L3SVI signal) and RTCM

Service Integrity
Not available

Provided
6

SYSTEM FOR DIFFERENTIAL CORRECTION AND MONITORING
SDCM has successfully passed the preliminary certification tests in accordance with the requirements
for typical approach operations with vertical guidance (APV-I and APV-II) and is pre-operational now
Approximate current L1 signal coverage zone
based on LUCH GEO relay satellites

Approximate future L1/L5 signals coverage zone
based on new LUCH GEO relay & other GEO satellites
onefold
coverage
70E
Com SV

twofold
coverage

16W
LUCH-5B

95E
LUCH-5V

threefoldcoverage

16W
LUCH

fourfoldcoverage

140E
Com SV

95E
LUCH

167E
LUCH

Information provided in the service area of SDCM
Current Status

Further Development• Real-time corrections for all GLONASS satellites andalmost all GPS satellites based on single-frequency
measurements• Integrity information for GLONASS & GPS satellites
with alert time within 6 s• Ionospheric corrections• Real-time corrections for the satellites of all GNSS based on
dual-frequency measurements (L1/L5 DFMC SBAS) and single-frequency
measurements (L1 SBAS)• Integrity information for the satellites of all GNSS with alert time within 6 s• Ionospheric corrections (for L1 SBAS)• L1/L5 signal authentication
7

GLONASS PERFORMANCE AND USER INFORMATION SUPPORTThe Russian System for GLONASS Performance Monitoring and Verification iscontinuously collecting global observation data for real-time GLONASS characteristics
assessment to confirm their correspondence to the guaranteed levels defined in
GLONASS Open Service Performance Standard (edition 2.2) and ensure that GLONASS
domestic and foreign civil users are provided with Basic (PNT) Service of proper quality
Applied User Center of Roscosmos State Space Corporation based on Information and Analysis Center for
Positioning, Navigation and Timing is providing continuous online information support to GLONASS
domestic and foreign civil users in accordance with the principle of transparency
Assessed characteristics of GLONASS and other GNSS

https://www.glonass-iac.ru

Updated GLONASS constellation status, health andalmanac
Notice Advisory to GLONASS Users

Links to GLONASS formal documents (Interface Control
Documents and Open Service Performance Standard)
Global ionospheric map by IAC PNT and results ofexperiments on GNSS monitoring & assessment

Global ionospheric mapby IAC PNT(for 08.01.2024 in TECu)

Web-site is available in Russian,Chinese, English, German &Spanish languages

8DEPARTMENT OF AUTOMATIC SPACE COMPLEXES, NAVIGATION AND EARTH OBSERVATION SYSTEMSROSCOSMOS State Space Corporation
42, Schepkina street., Moscow, 107996
Tel.: +7 (495) 631-90-00
info@roscosmos.ru; www.roscosmos.ru