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PROBA-3: thawj zaug "Precision tsim ya" Lub Hom Phiaj   

ESA's PROBA-3 lub hom phiaj, uas tau tshem tawm ntawm ISRO's PSLV-XL foob pob hluav taws thaum 5 Kaum Ob Hlis 2024, yog "hnub ci dab noj hnub ua" ob lub satellite tsim ntawm occulter thiab coronagraph spacecrafts. Nws yuav ua kom pom lub hnub ci corona los ntawm coronagraph spacecraft rau 6 teev nyob rau hauv txhua txhua 19h teev 36 feeb orbit los ntawm on-demand creation ntawm tag nrho cov hnub ci eclipse los ntawm lub occulter spacecraft ntawm tsim. Raws li kev ua qauv qhia ntawm kev tsim ya tawm cov thev naus laus zis, kev soj ntsuam-3 Lub Hom Phiaj  

Lub Laser Interferometer Space Antenna (LISA) lub hom phiaj uas tau txais ESA txoj kev mus ua ntej thaum ntxov xyoo no thiab tau npaj yuav tsim tawm rau xyoo 2035, yuav yog thawj qhov chaw-raws li gravitational yoj observatory mob siab rau nrhiav thiab kawm txog qhov tsawg zaus gravitational nthwv dej (GWs) nrog. zaus ntawm 0.1 mHz thiab 1 Hz (los yog millihertz ripples) tshwm sim los ntawm distortions nyob rau hauv cov ntaub ntawm space-time thoob plaws ntiaj teb. Nws yuav yog ib tug constellation ntawm peb spacecrafts nyob rau hauv qhov tseeb equilateral daim duab peb sab tsim nyob rau hauv qhov chaw. Txhua sab ntawm daim duab peb sab yuav ntev 2.5 lab km. Kev tsim ntawm peb lub spacecrafts yuav orbit lub hnub nyob rau hauv lub ntiaj teb-trailing heliocentric orbit ntawm 50 thiab 65 lab km ntawm lub ntiaj teb thaum tuav ib tug txhais tau tias inter- spacecraft sib cais deb ntawm 2.5 lab km.   

LISA lub hom phiaj yuav tsim los ntawm ob lub peev xwm tseem ceeb - "tsawg zaus gravitational yoj kuaj pom hauv qhov chaw" thiab "qhov tseeb tsim ya hauv qhov chaw". Thaum cov thev naus laus zis xav tau rau "kev ntsuas qhov nrawm nrawm nrawm hauv qhov chaw" tau sim hauv kev ya davhlau thiab ua qauv qhia los ntawm LISA Pathfinder lub hom phiaj thaum xyoo 2015-2017, thev naus laus zis rau "qhov tseeb tsim ya hauv qhov chaw" tsis ntev los no tau tshwm sim rau 5 Kaum Ob Hlis 2024 nrog "tag nrho hnub ci dab noj hnub-ua ob lub satellite tsim ntawm PROBA-3 lub hom phiaj" nkag mus heev elliptical kab. Nws tau tshem tawm ntawm ISRO's PSLV-XL foob pob hluav taws. 

PROBA (Project for On-Board Autonomy) -3 lub hom phiaj ntawm European Space Agency (ESA) muaj ob lub hom phiaj tseem ceeb: ua qauv qhia txog kev tsim cov thev naus laus zis, thiab kawm txog lub hnub ci corona sab hauv.  

PROBA-3 yog thawj zaug "precision tsim ya" lub hom phiaj. Nws yog tsim los ntawm ob lub dav hlau: occulter thiab coronagraph. Tus qub (piv txwv li, Occulter spacecraft) nrum tus duab ntxoov ntxoo meej rau ntawm Coronagraph spacecraft los tsim tag nrho cov hnub ci eclipses ntawm kev thov rau 150 teev nyob rau ib lub sij hawm, ua rau kev soj ntsuam ntawm ntau fainter hnub ci corona. Ob lub dav hlau hauv kev tsim yog sib cais los ntawm qhov deb ntawm XNUMX meters nrog qhov tseeb ntawm ob peb millimeters. Muaj tseeb heev ya ntawm cov chav nyob hauv qhov chaw yog qhov ua kom muaj kev cuam tshuam rau kev sib tsoo tshiab uas tsis tuaj yeem siv cov chaw ntev xws li LIGO, VIRGO, thiab lwm yam lossis Pulsar Timing Arrays (PTAs).  

Thaum tsim peb lub dav hlau dav hlau hauv LISA lub hom phiaj yuav ua rau kev ntsuas (los ntawm laser interferometry) ntawm qhov kev hloov me me ntawm qhov kev ncua deb ntawm qhov ntsuas huab cua hauv lub dav hlau uas tshwm sim los ntawm gravitational ripples, tsim ntawm ob lub dav hlau nyob hauv PROBA -3 lub hom phiaj yog tsim los pab saib xyuas. hnub ci corona los ntawm coronagraph spacecraft rau 6 teev nyob rau hauv txhua txhua 19h teev 36 feeb orbit los ntawm kev thov tsim ntawm tag nrho hnub ci eclipse los ntawm lub occulter spacecraft ntawm tsim.  

Cov xwm txheej ntuj hnub ci tag nrho tsis muaj sijhawm txaus los saib cov huab cua sab nraud ntawm lub hnub li ntawm kev thov lub sijhawm muab los ntawm PROBA-3 yuav pab tau zoo hauv kev kawm txog hnub ci corona thiab cov xwm txheej cuam tshuam rau kev kwv yees zoo dua ntawm huab cua thiab hnub ci cua daj cua dub uas paub txog. cuam ​​tshuam satellites, kev sib txuas lus infrastructures thiab fais fab kev tes hauj lwm nyob rau hauv lub ntiaj teb no. 

References:  

  1. ESA. Proba –3: Precise form flying to see the Sun's corona. Muaj nyob ntawm https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3 
  1. ESA. Dab noj hnub ua ob lub satellite Proba-3 nkag mus rau lub orbit. 5 Kaum Ob Hlis 2024. Muaj nyob ntawm https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Eclipse-making_double_satellite_Proba-3_enters_orbit 
  1. ESA. Tsib qhov chaw paub tsis meej Proba-3 yuav pab daws.Muaj nyob ntawm https://www.esa.int/Science_Exploration/Space_Science/Five_space_mysteries_Proba-3_will_help_solve 

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Lwm yam khoom  

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Umesh Prasad
Umesh Prasad
Science journalist | Founder editor, Scientific European magazine

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