AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur télécharger pdf

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL

64 TELECOMUNICAŢII ● Anul LII, nr. 2/2009

S-band ground station prototype for low-earth orbit

nanosatellite missions

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL*

Rezumat. Acest articol prezintă un prototip de staţie

terestră în banda S, destinată experimentelor de

comunicaţii cu rată mare de transfer de date cu nano-

sateliţi aflaţi pe orbită terestră joasă. In măsura în care

funcţionarea ei va fi demonstrată în timpul misiunii

GOLIAT sau a altora similare, acest sistem de comu-

nicaţii va permite recepţia unei cantităţi mari de date,

făcând fezabilă transmisia de imagini de pe nano-

sateliţi. O altă caracteristică importantă a acestei staţii

este costul său redus comparativ cu staţiile comeciale

existente pentru comunicaţii în banda S cu sateliţi aflaţi

pe orbită terestră joasă, făcând-o astfel accesibilă

echipelor care dezvoltă un proiect spaţial cu buget mic.

Cuvinte cheie: nanosatelit, orbită terestră joasă,

banda S, staţie la sol, misiunea Goliat.

Abstract. This paper presents an S-band earth

station prototype for high data-rate communication

experiments with low earth-orbit nanosatellites. As

far as it will be demonstrated during the GOLIAT

mission or other similar ones, this communication

system will allow the downlink of large quantities of

data, making nanosat imaging feasible. Another im-

portant feature of this station is its low cost com-

pared to existing commercially available S-band

LEO ground stations, in order to make it accessible

to teams developing a small budget space project.

Keywords: nanosatellite, low-earth orbit, S-band,

ground station, Goliat mission.

1. Introduction

Recent

∗

efforts to provide low cost access to

space for education, science and space-based

component testing has led to the development of

nanosatellites (the term "nanosatellite" is usually ap-

plied to the name of an artificial satellite with a mass

between 1 and 10 kg).

Tiny satellites lack the power supply and the

necessary room for a large conventional radio trans-

ponders on board. It is why various miniaturized or

innovative communication systems have been pro-

posed over years. However, few of these have been

demonstrated in practice.

∗ BITNET Research Center on Sensors & Systems SRL.

With very few exceptions, space-ground communi-

cations are actually made in VHF/UHF bands where

the hardware requirements (such as antenna pointing

accuracy) are not as critical as for higher frequencies.

In VHF/UHF bands, a reliable and cheap ground

station can be integrated using commercial off-the-

shelf amateur radio hardware and software. Compared

to typical existing amateur radio VHF/ UHF systems on

nanosatellites, S-band communication offers data

throughput improvements by taking advantage of

broader available bandwidth and higher frequency.

The purpose of this project was to build a low

cost S-band earth station prototype which is able to

provide reliable communications between a Low-

Earth Orbit nanosatellite and the ground.

1 2 3 4 5 6 7 8

Résumé du contenu

Page 1 - 1. Introduction

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL 64 TELECOMUNICAŢII ● Anul LII, nr. 2/2009 S-band ground station prototype for low-earth orbit nanos

Page 2 - 3. Ground station prototype

S-band ground station prototype for low-earth orbit nanosatellite missions TELECOMUNICAŢII ● Anul LII, nr. 2/2009 65 2. Space communication system a

Page 3

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL 66 TELECOMUNICAŢII ● Anul LII, nr. 2/2009 For antenna pointing, an AlphaSpid BIG RAS AZ/EL rotator

Page 4

S-band ground station prototype for low-earth orbit nanosatellite missions TELECOMUNICAŢII ● Anul LII, nr. 2/2009 67 RS-232, and to an antenna throu

Page 5

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL 68 TELECOMUNICAŢII ● Anul LII, nr. 2/2009 3.4. The link budget for the GOLIAT nanosatellite GOLIAT

Page 6

S-band ground station prototype for low-earth orbit nanosatellite missions TELECOMUNICAŢII ● Anul LII, nr. 2/2009 69 Table 3.5 GOLIAT nanosatellite

Page 7 - 4. Conclusions

Octavian CRISTEA, Paul DOLEA, Paul Vlăduţ DASCĂL 70 TELECOMUNICAŢII ● Anul LII, nr. 2/2009 Fig. 3.3. Ground station antenna. Fig. 3.4. Ground s

Page 8 - References

S-band ground station prototype for low-earth orbit nanosatellite missions TELECOMUNICAŢII ● Anul LII, nr. 2/2009 71 Acknowledgements. The developme

Plus de documents pour Non AlfaRadio AlfaSpid Rotator and Controller

Voir le document AlfaRadio AlfaSpid Rotator and Controller Manuel d'instructions

AlfaRadio AlfaSpid Rotator and Controller Manuel d'instructions (21 pages)

Voir le document AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur

AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur (18 pages)

AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur (20 pages)

AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur (15 pages)

AlfaRadio AlfaSpid Rotator and Controller Manuel d'instructions (23 pages)

Commentaires sur ces manuels

Pas de commentaire

AlfaRadio AlfaSpid Rotator and Controller Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Non AlfaRadio AlfaSpid Rotator and Controller. S-band ground station prototype for low-earth orbit Manuel d'utilisatio

Résumé du contenu

Plus de documents pour Non AlfaRadio AlfaSpid Rotator and Controller

Commentaires sur ces manuels

Produits connexes et manuels pour Non AlfaRadio AlfaSpid Rotator and Controller