First speaker. Dr Caroline Mateo-Segura

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1 First speaker Dr Caroline Mateo-Segura

2 Next speaker Martin Jarrold

3 Next speaker Thomas Lohrey

4 EUTELSAT, ANTENNAS TYPE APPROVAL AND INNOVATION Thomas Lohrey April 2017

5 A KEY PLAYER IN THE SPACE BUSINESS Pioneer in space 40 years of experience 39 Satellites for global coverage Solid investment programme 5 satellites to launch 2

6 A DIGITAL ENTREPRENEUR Remplacer par l image de l équipe devant E65WA? Ou par une du SCC? 6336 TV channels 1200 Radio stations 1 billion TV viewers 1000 Industry experts 37 nationalities Revenues* 1.53 billion * As of 30 June

7 A FLEXIBLE, WORLD-LEADING GLOBAL FLEET Diversified resources in C, Ku and Ka bands 8

8 WELCOME TO EUTELSAT EARTH STATION APPROVAL Full document can be 8

9 Interference The impact The principal contribution to service interruption, customer dissatisfaction and loss of revenue. Operator Error 80-85% of cases Equipment faults 10-15% of cases Deliberate Jammers Less than 5% of cases normally politically. (high profile gets the media attention). Deliberate Pirating - transmitting for free less than 1% of cases

10 ADJACENT SATELLITE INTERFERENCE Examples 10

terminal Interference Satellite operator Terminal Hardware +

11 FIELDS OF INTEREST Service provider Network operator Hot Line usage Maximum usable Throughput Link Efficiency Bit/Hz per terminal Interference Satellite operator Terminal Hardware + Installation No. of terminals In space capacity Service investor Business plan 11

12 CASE STUDY AFRICAN BANK

13 WHAT IS EUTELSAT EARTH STATION APPROVAL Eutelsat specification: document EESS Eutelsat approval process document: ESOG 120 Customer benefits Confidence in certified antenna quality. Required in many tenders. Accepted by most other satellite operators. Easy and fast Eutelsat terminal line up. 13

14 VSAT Innovation & Development

15 INSTALLATION APPS Available Apps KA-SAT pointer for Tooway Eutelsat 36 E Pointer for Gilat Eutelsat finder Konnect Africa Pointer for Hughes in preparation Entire installation and activation account management Secured with GPS data for installation management Patent pending

16 TRIPLE PLAY - DICHROIC SUB-REFLECTOR Utilisation of one satellite position on Ku and Ka band Enhancing the utilisation bandwith of a terminal by 50% Reflector First mass market capable Dichroic sub-reflector ever (patent pending) additional Ku- band Feed K- / Ka- band Feed (TRIA)

17 KA KU BAND DSR FOR TOOWAY Requirement: TV reception from 9 East and 7 East with Tooway terminals (triple play)

18 EUTELSAT, TERMINALS AND ANTENNA APPROVAL Sept. 2016

19 Next speaker Vincent Fraux

20 Next speaker Dr Richard Holliday

21 Satcom Antennas A Question of Accuracy At one time it was a rule of thumb that the accuracy of parabolic antennas was fine if there was no divergence from the profile by more than 1/10 λ, or 1/20 λ if you wanted a really good antenna. But now, better than 1/30 λ is often asked for. Why? Dr. Richard Holliday, Elite Antennas Ltd Catapult Antenna Workshop 6 th April 2017

22 Ans. Possibly the advent of Ka & higher communications bands For Ka band at 30 GHz requests for 0.3mm RMS or better surface accuracy are not uncommon, i.e. ~1/33 λ Ruze's Equation (1965) is now in vogue! Loss in Gain = (δ/λ)^2 db Where δ = RMS surface deviation For 0.3 mm RMS, loss in gain would be 0.62 db and for 0.5 mm RMS this increases to 1.71 db

23 Ruze's Model used to test his Equation

24 Sources of profile errors Manufacture. Handling and fitting. Gravity. Temperature. Environmental.

25 Qu 1. How should the surface error be measured? Laser, Optical Photogrammetry, Optically, Mechanically...? Qu 2. How should the measuring points be distributed...? Randomly (Ruze), Uniformly or Weighted to the reflector R.F. Distribution...?

26 Distribution of measuring points

27 Cost of measuring antenna errors Typically it costs upwards of 1,600 / day to hire a metrology company to fully measure the surface profile of an antenna and then adjust the profile and confirm the final profile by remeasurement. Accurate antennas are expensive.

28 Elite's method to increase and maintain reflector accuracy By triangulation of the cross section of the antenna using a stiff rear drum with adjustable turn buckle struts to the rim of the reflector. Accuracies of better than 0.3mm RMS have been achieved with antennas of 3.5m and upwards. Environmentally a very robust structure.

29 Ka-band antenna with adjusting struts and rigid central drum

30 Final thoughts and questions With so many loose ways of specifying reflector antenna accuracy how would you specify accuracy? As a user which is the most important criteria for you, Cost or Accuracy? Do you have the confidence that your antennas will maintain their accuracy?

31 Many thanks for listening

32 Next speaker Mark Lambert

33 10 Minutes Coffee Break

Chapter 4 The RF Link

Chapter 4 The RF Link The fundamental elements of the communications satellite Radio Frequency (RF) or free space link are introduced. Basic transmission parameters, such as Antenna gain, Beamwidth, Free-space