Experimentul realizat de NASA în parteneriat cu High Schools United – implicând elevi de liceu – se numeşte „High Definition Earth Viewing” (HDEV) – „Pământul văzut HD” – şi este realizat cu ajutorul a patru camere video care au fost ataşate Staţiei Spaţiale Internaţionale.
Controlate cu senzori de temperatură, camerele sunt expuse radiaţiilor solare, permiţând astfel astronauţilor să înţeleagă cum aceste radiaţii afectează acest gen de aparatură.
Interesant este şi că elevii care au participat la acest experiment uimitor au contribuit la rândul lor la conceperea designului unor componente ale camerelor care transmit în direct imagini ale Terrei.
Respectivele camere sunt îndreptate în permanenţă spre Pământ şi oferă, în direct, imagini extraordinare, care pot fi vizionate în timp real de oriunde din lume, de către orice posesor de computer sau gadget conectat la internet.
ATENŢIE! Uneori, transmisiunea este întreruptă, pentru scurt timp însă, deoarece semnalul video se schimbă între camere, iar, din când în când, imaginile sunt neclare, când ISS se află deasupra părţii întunecate a planetei.
Atunci când se face tranziţia de semnal, imaginea care se poate vedea în transmisiunea în direct devine gri.
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