Advantages of LEO Satellite

Communication SystemsDuring

Speaker : Mr.Huseyin Caglar, General Manager,Globalstar Avrasya A.S.

-Regional Joint Conference on

“Disaster: Relief and Management – International Cooperation & Role of ICT” Sheraton Al Montazah Hotel, Alexandria, Egypt, 14 - 17 April 2007

SATELLITE COMMUNICATIONS ARE AN ESSENTIAL TOOL FOR EMERGENCY MANAGEMENT AND

DISASTER RECOVERY

•Man-Made disasters•Earthquakes•Fire•Tornados•High Winds•Hurricanes•Ice Storms•Flash Flooding

Users today have two common kinds of satellite communications networks available to support emergency response activities

• Geostationary Earth Orbit Satellites (GEO)

• Low Earth Orbit Satellites (LEO)

Iridium(780 km)

ICO (10355 km)

Globalstar(1414 km)

Teledesic(700 km)

Geostationary(36,000 km)

Comparing

1. Larger round trip delays – 250 ms latency uıp/down link2. Poor look angle elevations at higher latitudes3. Must be pointed to acquire a satellite

1. Covers 42.2% of the earth's surface 2. Constant view 3. No problems due to Doppler

24 hrs

36,000 km

Geostationary Earth Orbit

GEO

1.Short life2.Short LOS 3.Short call interruptions depending to the position

Disadvantages

1. Lower launch costs 2. Very short round trip delays 3. Small path loss

Advantages

15 minTime in LOS

200-3000 km Height

Low Earth OrbitDescription

LEOType

Vital advantage of LEO systems for users

- Users do NOT need to move for findingsatellites because the satellites are moving

-Phones can communicate with multi satellites at the same time

Vital advantage of LEO system for Rescue Teams

•Sometimes Search&Rescue Teams should stay long durations on the same place

•Their position can not be suitable to see the sky clearly

• Hugh buildings or long trees can prevent the satellite phones to see the satellites .

•LEO satellite system can work more efficiently than the other satellite systems on these conditions. HOW ??HOW ??

Vital advantage of LEO systems for Rescue Teams

Geostaionary Satellites

!!!!!!

South

Vital advantage of LEO systems for Rescue Teams

LEO Satellites

South

GEO

Turksat-1C /2A

42º E

Hotbird

31.3º E

13º E

Inmarsat IOR

64º E

Inmarsat AOR

15.5 Wº

- Phones must be pointed to acquire a satellite as dishes for TV.- Communicates with one satellite only and always must see this satellite directly.

Clark Belt

Turksat-1B

Introducing GlobalstarIntroducing Globalstar

What is Globalstar ?

• Globalstar is an GMPCS operator uses LEO satellites.LEO satellites.• The Satellite Operations Control Center (SOCC) manages

the Globalstar satellite constellation which located in USA.

Ground Operations Control Center

(GOCC)

Satellite Operations Control Center

(SOCC)

What is Globalstar ?

• 26(twentysix) Gateways in the world • 19(nineteen) of them belongs to the 9 (nine) Independent Gateway Operators(IGO)

••Globalstar Avrasya(Turkey)Globalstar Avrasya(Turkey)••Elsacom(Italy)Elsacom(Italy)••Globaltel(Russia)Globaltel(Russia)••Dacom(S.Korea)Dacom(S.Korea)••China Spacecom(China)China Spacecom(China)••Tesam Peru(Peru)Tesam Peru(Peru)••Globalstar Mexico (Mexico)Globalstar Mexico (Mexico)••Globalsta Australia(Australia)Globalsta Australia(Australia)••Globalstar do Brasil(Brasil)Globalstar do Brasil(Brasil)

What is Globalstar ?

Globalstar system uses latest high modulation CDMA techonolgy

Who is Globalstar Avrasya ?

• Globalstar Avrasya is an IGO whoprovides Globalstar services to the countries in Middle East below.

••BahrainBahrain••EgyptEgypt••IraqIraq••IranIran••JordanJordan••KuwaitKuwait••LebanonLebanon

••PalestinePalestine••QatarQatar••Saudi ArabiaSaudi Arabia••SyriaSyria••TurkeyTurkey••United Arab United Arab EmiratesEmirates

Gateway of Globalstar Avrasya

Globalstar Avrasya Globalstar Avrasya -- Oğulbey Gateway Oğulbey Gateway

Ankara Ankara --TürkiyeTürkiye

• Globalstar Avrasya would be pleased to co-operate with the Government Departments and Communities in order to support disaster recovery in Middle East, by using high advantages of LEO satellite communication systems and CDMA technologies.

QuestionsQuestions ?