الشعبيــة الديمقراطية الجزائريــة الجمهوريــة REPUBLIQUE ALGERIENNE DEMOCRATIQUE ET POPULAIRE

People’s Democratic Republic of Algeria

SBAS system of Algeria

Presented by

Mr. Abderrahmane Euldji

RNSS Symposium, Abuja, Nigeria,

October 5, 2018

Alcomsat-1 overview

Alcomsat-1 satellite is the first Algerian satellite of telecommunications. It is Located at 24.8°W. It was successfully launched on December 11, 2017.

1

Its payload includes : 19 BSS and FSS Ku-band channels 12 Ka-band channels 02 navigation channels

2 Utilisateur Utilisateur

Broadcasting

Internet access

Augmentation of Navigation

Telemedicine

E-Learning

VoIP and Videoconference

Alcomsat-1 services and applications

3

Ku band

Ku BSS :

Tx : 17.7 ~ 18.1 GHz

Rx : 12,1 ~ 12.5 GHz

Ku FSS :

Tx : 13.75 ~ 14 GHz

Rx : 12,5 ~ 12.75 GHz

Forward link :

Tx : 28 ~ 29.2 GHz

Rx : 18.92 ~ 20.2 GHz

Return link :

Tx : 29.3 ~ 30 GHz

Rx : 18.2 ~ 18.92 GHz

C1/L1 band :

Tx : 6695.42 – 6699.42 MHz

Rx : 1573.42 – 1577.42 MHz

C5/L5 band:

Tx : 6630.45 – 6650.45 MHz

Rx : 1166.45 – 1186.45 MHz

Frequancy bands :

Ka band Navigation band

Alcomsat-1 overview

L1 & L5 signals are transmitted through the active navigation channels of Alcomsat-1 as an SBAS for GPS

(temporary GPS PRN 148). The coverage of Alcomsat-1 includes whole Africa, South America and part of Europe.

The transponders operating in this bands are still under test, and their expected time to be fully operational is from

June 2019

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Algeria SBAS Introduction

ALCOMSAT-1

DPC

GPS

ROSA-A

GULS

C1

ban

d

L1 band

IGS Ultra Rapid Products

Navigation Message

ARS

L1

ba

nd

Augmentation Message

L1

ban

d d

ow

nlin

k

Algeria SBAS is constituted from :

18 ground Reference Stations (RS),

03 Augmented Reference Stations (ARS),

01 Data Process Center (DPC),

01 Ground UpLink Station (GULS),

Alcomsat-1 navigation transponders,

User terminals.

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Algeria SBAS Architecture