O le Beidou Navigation Satellite System (BDS, e taʻua foi o le COMPASS, faʻaliliuga Saina: BeiDou) o se faiga faʻatautaia satelite faʻavaomalo na fausia tutoatasi e Saina. O le lona tolu fa'ata'ita'iga satelite fa'ata'ita'i i tua atu o le GPS ma le GLONASS.
Beidou Tupulaga I
O le fa'asoaina o fa'ase'e fa'ase'e a Beidou Generation I e fa'atatau i le Radio Determination Satellite Service (RDSS) fa'aili, fa'apitoa e vaevaeina i luga ma lalo fa'amau:
a) Uplink Band: O lenei fa'aili e fa'aoga mo masini fa'aoga e fa'asalalauina fa'ailo i satelite, fa'atasi ai ma le fa'asologa ole 1610MHz i le 1626.5MHz, e iai ile L-band. O lenei fa'ailoga fa'aili e mafai ai e masini o le eleele ona tu'uina atu talosaga fa'atulagaina ma isi fa'amatalaga talafeagai i satelite.
b) Downlink Band: O lenei fa'aili o lo'o fa'aogaina mo satelite e tu'uina atu fa'ailo i masini fa'aoga, fa'atasi ai ma le fa'asologa ole 2483.5MHz i le 2500MHz, e iai ile S-band. O lenei fa'aili fa'aili e mafai ai e satelite ona tu'uina atu fa'amatalaga tau folauga, fa'atulagaina o fa'amaumauga, ma isi auaunaga e mana'omia i masini o le eleele.
E mata'ina o le fa'asoaina o alaleo alaleo o le Beidou Generation I na fa'atulaga muamua e fa'amalieina mana'oga fa'apitoa ma le fa'atulagaina sa'o mana'omia o lena taimi. Faatasi ai ma le alualu i luma faatekinolosi ma le faʻaleleia faifaipea i le Beidou system, o augatupulaga mulimuli ane, e aofia ai Beidou Generation II ma le III, na faʻaaogaina laina faʻasolosolo eseese ma auala faʻaogaina faailoilo e tuʻuina atu ai le maualuga-saʻo ma sili atu ona faʻatuatuaina faʻatauvaʻa ma faʻatulagaina auaunaga.
Beidou Tupulaga II
Beidou Generation II, o le faiga lona lua o augatupulaga o le Beidou Navigation Satellite System (BDS), o se faiga fa'akomepiuta satelite avanoa i le lalolagi atoa na atiaeina e Saina. Fausia i luga o le faavae o Beidou Generation I, e faʻamoemoe e tuʻuina atu le saʻo maualuga, maualuga le faʻatuatuaina tulaga, faʻatautaia, ma le taimi (PNT) auaunaga i tagata faʻaoga i le lalolagi atoa. O le faiga e aofia ai vaega e tolu: avanoa, eleele, ma le tagata faʻaoga. O le vaega avanoa e aofia ai le tele o satelite faʻatautaia, o le vaega o le eleele e aofia ai nofoaga faʻatonutonu matai, nofoaga mataʻituina, ma nofoaga uplink, ae o le vaega faʻaoga e aofia ai masini e maua ai.
Ole vaevaega fa'alava ole Beidou Generation II e aofia ai vaega e tolu: B1, B2, ma le B3, fa'atasi ai ma ta'iala fa'apitoa e pei ona taua i lalo:
a) Fa'aili B1: Fa'asologa o taimi ole 1561.098MHz ± 2.046MHz, e fa'aaoga muamua mo folauga fa'alaua'itele ma auaunaga fa'atulagaina.
b) Fa'aili B2: Fa'asologa o taimi ole 1207.52MHz ± 2.046MHz, fa'apena fo'i ona fa'aoga mo auaunaga fa'alemalo, galulue fa'atasi ma le fa'aili B1 e tu'uina atu avanoa fa'atulaga lua mo le fa'aleleia atili o le tulaga sa'o.
c) Fa'aili B3: Fa'asologa o taimi ole 1268.52MHz ± 10.23MHz, e fa'aaoga muamua mo auaunaga faamiliteli, ofoina atu maualuga tulaga sa'o ma le mafai ona fa'alavelave.
Beidou Tupulaga III
O le lona tolu o augatupulaga Beidou Navigation System, lea e lauiloa foi o le Beidou-3 Global Navigation Satellite System, o se faiga fa'akomepiuta satelite avanoa i le lalolagi atoa na fausia ma fa'atautaia e Saina. Ua ausia se oso mai le faʻaitulagi i le faʻasalalauga faʻavaomalo, tuʻuina atu le maualuga-saʻo, maualuga-faʻalagolago tulaga, faʻatautaia, ma le taimi auaunaga i tagata faʻaoga i le lalolagi atoa. Beidou-3 e ofoina atu le tele o faailo o auaunaga i luga o le B1, B2, ma le B3 fusi, e aofia ai le B1I, B1C, B2a, B2b, ma le B3I. Ole fa'asologa ole taimi ole fa'ailoga nei e fa'apea:
a) Fa'aili B1: B1I: Fa'asologa o le ogatotonu ole 1561.098MHz ± 2.046MHz, o se fa'ailoga fa'avae e fa'aaogaina lautele i masini fa'atautaiga eseese; B1C: Fa'asao le ogatotonu ole 1575.420MHz ± 16MHz, o se fa'ailo muamua e lagolagoina satelite Beidou-3 M/I ma lagolagoina e alalaupapa feavea'i fou, maualuga maualuga.
b) Fa'aili B2: B2a: Fa'asao le ogatotonu ole 1176.450MHz ± 10.23MHz, fa'apea fo'i ma fa'ailo muamua e lagolagoina satelite Beidou-3 M/I ma avanoa i luga ole telefoni feavea'i fou; B2b: Fa'atotonugalemu ole 1207.140MHz ± 10.23MHz, lagolago Beidou-3 M/I satelite ae na'o avanoa i luga o laina telefoni feavea'i filifilia.
c) Fa'aili B3: B3I: Fa'asao tutotonu o le 1268.520MHz ± 10.23MHz, lagolagoina e satelite uma i le Beidou Generation II ma le III, fa'atasi ai ma le lagolago sili mai le tele-mode, multi-frequency modules.
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Taimi meli: Sep-25-2024