Mercury-Atlas 4 was an unmanned spaceflight of the Mercury program. It was launched on September 13, 1961 at 14:09 UTC from Launch Complex 14 at Cape Canaveral, Florida. A Crewman Simulator instrument package was aboard. The craft orbited the Earth once. This flight was an orbital test of the Mercury Tracking Network and the first successful orbital flight test of the Mercury program. (All previous successful launches were suborbital.

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  • Mercury-Atlas 4 was an unmanned spaceflight of the Mercury program. It was launched on September 13, 1961 at 14:09 UTC from Launch Complex 14 at Cape Canaveral, Florida. A Crewman Simulator instrument package was aboard. The craft orbited the Earth once. This flight was an orbital test of the Mercury Tracking Network and the first successful orbital flight test of the Mercury program. (All previous successful launches were suborbital. ) The payload consisted of a pilot simulator (to test the environmental controls), two voice tapes (to check the tracking network), a life support system, three cameras, and instrumentation to monitor levels of noise, vibration and radiation. It demonstrated the ability of the Atlas LV-3B rocket to lift the Mercury capsule into orbit, of the capsule and its systems to operate completely autonomously, and succeeded in obtaining pictures of the Earth. It completed one orbit prior to returning to Earth. The capsule was recovered 176 miles east of Bermuda. One hour and 22 minutes after splashdown the destroyer USS Decatur (DD-936) (which was 34 miles from the landing point) picked up the capsule. On the MA-4 mission, all flight objectives were successfully achieved. The mission used Mercury spacecraft # 8A (which had also been launched on the aborted MA-3 mission as spacecraft # 8) and Atlas # 88-D.
  • Mercury-Atlas 4 war ein unbemannter Testflug im Rahmen des Mercury-Programms. Der Start erfolgte am 13. September 1961 vom Launch Complex 14 in Cape Canaveral Air Force StationCape Canaveral, Florida. Dies war der erste erfolgreiche Orbitalflug im Rahmen des Programms, da alle früheren Flüge entweder ballistisch waren oder abgebrochen werden mussten. Der Flug diente vor allem dem Test der für Orbitalflüge notwendigen Bodenstationen. Außerdem befand sich in der Mercury-Kapsel ein Simulatorsystem, das einen Menschen simulieren sollte. Dazu gehörte das Testen der Umweltkontrollen und der Lebenserhaltungssysteme, zwei Kassettenrekorder um die Kommunikation mit den Bodenstationen zu testen, drei Kameras und Instrumente, die das Geräusch-, Vibrations- und Strahlungsniveau aufzeichneten. Nach einem Erdumlauf wasserte die Kapsel 176 Meilen östlich von Bermuda. Sie wurde nach einer Stunde und 22 Minuten vom amerikanischen Zerstörer USS Decatur (DD-936) geborgen. Dieser befand sich zum Zeitpunkt der Wasserung 34 Meilen von der Kapsel entfernt. Für die Mission wurde die Mercury-Kapsel #8 (die schon für die abgebrochene MA-3 Mission verwendet wurde) und die Atlas #88-D eingesetzt.
  • Mercury-Atlas 4 byl testovací let programu Mercury. Byl to první orbitální let programu Mercury (všechny předešlé byly suborbitální. Raketa Atlas D s maketou #8A, odstartovala v 14:09 UTC. Start proběhl úspěšně a maketa lodě Mercury obletěla jednou zemi. Poté přistála v oceánu 283 kilometrů od Bermud, poblíž lodi USS Decatur. Ta loď vyzvedla a dopravila na pevninu.
  • Mercury-Atlas 4 fu una missione nello spazio priva di equipaggio nel corso del programma Mercury degli Stati Uniti d'America. Venne lanciata da Cape Canaveral il 13 settembre 1961 alle ore 14:09 UTC. A bordo si trovava un simulatore d’equipaggio, cioè un pacco di strumenti che simularono la presenza di un essere umano a bordo. La capsula spaziale orbitò intorno alla Terra per una volta. Scopo della missione fu il collaudo del sistema di trasmissione via radio del Mercury in orbita; inoltre essa fu in pratica il primo volo in orbita riuscito con successo nell’ambito del progamma Mercury. Tutte le precedenti missioni del programma terminate con successo infatti erano semplici voli suborbitali. Il simulatore d’equipaggio, cioè il carico trasportato durante la missione, era composto da un pupazzo quale pilota (per testare i sistemi di regolamentazione della temperatura), due nastri di registrazione di voce (per testare le trasmissioni via radio), un sistema di sopravvivenza, tre camere fotografiche, strumenti per misurare il livello di rumore, vibrazioni e radiazioni. La missione fu la dimostrazione dell’idoneità del razzo vettore del tipo Atlas per portare la capsula Mercury in orbita. Inoltre poté essere dimostrato che la capsula ed i suoi sistemi erano in grado di operare completamente automaticamente ed autonomamente. Un particolare successo venne valutato la registrazione di diverse immagini della Terra. La capsula percorse un’orbita intera intorno alla Terra prima di atterrare senza particolari problemi. Venne recuperata a circa 280 km ad est delle isole Bermude, un ora e 22 minuti dopo l’atterraggio. La capsula venne portata a bordo dell’incrociatore USS Decatur che si trovava a circa 55 chilometri dal punto di atterraggio. La MA-4 fu un pieno successo dato che tutti gli obbiettivi della missione era stati perfettamente centrati. Per la missione venne impegnata la capsula Mercury con il numero di serie 8A, cioè la stessa già impegnata nella missione interrotta durante la fase di lancio MA-3. Il razzo vettore Atlas aveva il numero di serie 88-D.
  • Mercury-Atlas 4 (MA-4) — jeden z testowych lotów pierwszego amerykańskiego załogowego statku kosmicznego Mercury, pierwszy jaki osiągnął orbitę okołoziemską. Ta sama kapsuła brała udział w nieudanym locie Mercury-Atlas 3.
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  • Mercury-Atlas 4 was an unmanned spaceflight of the Mercury program. It was launched on September 13, 1961 at 14:09 UTC from Launch Complex 14 at Cape Canaveral, Florida. A Crewman Simulator instrument package was aboard. The craft orbited the Earth once. This flight was an orbital test of the Mercury Tracking Network and the first successful orbital flight test of the Mercury program. (All previous successful launches were suborbital.
  • Mercury-Atlas 4 war ein unbemannter Testflug im Rahmen des Mercury-Programms. Der Start erfolgte am 13. September 1961 vom Launch Complex 14 in Cape Canaveral Air Force StationCape Canaveral, Florida. Dies war der erste erfolgreiche Orbitalflug im Rahmen des Programms, da alle früheren Flüge entweder ballistisch waren oder abgebrochen werden mussten. Der Flug diente vor allem dem Test der für Orbitalflüge notwendigen Bodenstationen.
  • Mercury-Atlas 4 byl testovací let programu Mercury. Byl to první orbitální let programu Mercury (všechny předešlé byly suborbitální. Raketa Atlas D s maketou #8A, odstartovala v 14:09 UTC. Start proběhl úspěšně a maketa lodě Mercury obletěla jednou zemi. Poté přistála v oceánu 283 kilometrů od Bermud, poblíž lodi USS Decatur. Ta loď vyzvedla a dopravila na pevninu.
  • Mercury-Atlas 4 fu una missione nello spazio priva di equipaggio nel corso del programma Mercury degli Stati Uniti d'America. Venne lanciata da Cape Canaveral il 13 settembre 1961 alle ore 14:09 UTC. A bordo si trovava un simulatore d’equipaggio, cioè un pacco di strumenti che simularono la presenza di un essere umano a bordo. La capsula spaziale orbitò intorno alla Terra per una volta.
  • Mercury-Atlas 4 (MA-4) — jeden z testowych lotów pierwszego amerykańskiego załogowego statku kosmicznego Mercury, pierwszy jaki osiągnął orbitę okołoziemską. Ta sama kapsuła brała udział w nieudanym locie Mercury-Atlas 3.
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