NASA Artemis I – Flight Day Four: GO for Outbound Powered Flyby

Orion Selfie

Orion snapped this high-resolution selfie in space with a camera mounted on its solar array wing during a routine external inspection of the spacecraft on the third day of the Artemis I mission. Credit: NASA

Testing WiFi Signals, Radiator System, GO for Outbound Powered Flyby

NASA’s Artemis I Mission Management Team polled “go” on Saturday, November 19 for Orion’s outbound powered flyby past the Moon. Starting at 7:15 a.m. EST (4:15 a.m. PST) on Monday, November 21, NASA will cover the flyby live on NASA TV, the agency’s website, and the NASA app. The burn is planned for 7:44 a.m. As the Orion capsule passes behind the Moon from 7:25 a.m. through 7:59 a.m., it will lose communication with Earth. It will make its closest approach of approximately 80 miles (130 km) from the surface at 7:57 a.m.

During flight day four, each solar array was moved to different positions by flight controllers to test the strength of the WiFi signal with the arrays in different configurations. The WiFi transfer rate between the camera on the tip of the solar array panels and the camera controller was tested by the Integrated Communications Officer, or INCO. The goal was to determine the best position for the most efficient transfer of imagery files. Teams discovered that having multiple cameras on at once can impact the WiFi data rate. Therefore, to optimize transfer time in the future, solar array wing file transfer activities will be accomplished from one solar array wing at a time.

The Emergency, Environmental, and Consumables Manager, or EECOM, tested Orion’s radiator system. Two radiator loops on the spacecraft’s European Service Module help expel excess heat generated by different systems throughout the flight. Flight controllers are testing sensors that maintain the coolant flow in the radiator loops, switching between different modes of operation and monitoring performance. During speed mode, the coolant pumps operate at a constant rate. This is the primary mode used during Artemis I. Flow control mode adjusts the pump speed as needed to maintain a constant flow through the system. The flight test objective is to monitor system performance and the accuracy of flow sensors to characterize the stability of this mode of operation. Each loop is monitored in flow control mode for 72 hours to provide sufficient data for use on future missions.

Orion Star Trackers

Star trackers are sensitive cameras that take pictures of the star field around Orion. By comparing the pictures to its built-in map of stars, the star tracker can determine which way Orion is oriented. The star trackers on Orion are located on the European Service Module on either side of the optical navigation camera. This November 2019 photo was taken as the Orion crew and service module stack for Artemis I was lifted out of the Final Assembly and Test (FAST) cell. Credit: NASA

As part of planned testing throughout the mission, the guidance, navigation, and control officer, also known as GNC, performed the first of several tests of the star trackers that support Orion’s navigation system. Star trackers are a navigation tool that measure the positions of stars to help the spacecraft determine its orientation. In previous flight days, engineers evaluated initial data to understand star tracker readings correlated to thruster firings.

Engineers hope to characterize the alignment between the star trackers that are part of the guidance, navigation and control system and the Orion inertial measurements units, by exposing different areas of the spacecraft to the Sun and activating the star trackers in different thermal states.

Just after 5:30 p.m. on November 19, Orion had traveled 222,823 miles from Earth and was 79,011 miles from the Moon, cruising at 812 miles per hour. You can track Orion via the Artemis Real-Time Orbit Website, or AROW.

Overnight, engineers in mission control will uplink large data files to Orion to better understand how much time it takes for the spacecraft to receive sizeable files. On flight day five, Orion will undergo its third planned outbound trajectory correction burn to maneuver the spacecraft and stay on course to the Moon.

3 Comments on "NASA Artemis I – Flight Day Four: GO for Outbound Powered Flyby"

  1. Sounds great but, how is the internal atmosphere. Not a word……..

  2. Know the budget is $93 Billion….and I know the objective is to replicate the Apollo mission from over 50 years ago, but how can we possibly justify this cost??

  3. It sure is amazing achievement and an adventure; but the question is, while there are great many other names to give the space mission, why did NASA choose to give the first mission Apollo and the second mission Artemis? The Biblical history gives very clear information that these two are among the ancient gods to whom people without knowledge used to worship and serve based on tradition and culture. Why a highly educated group of people of NASA who considers such acts as a myth and unscientific turn around to oppose the one true God and stand against He who has undeniable and indisputable factual witnesses as it is recorded in the Bible?
    In case you haven’t known or aware of this very chosen achievement and adventure you are involved in is very clearly recorded in His written Word the Bible that this actually will happen in the end times!
    Daniel 7:7-8, 8:23-25
    I saw in the night visions, and behold, a fourth beast, dreadful and terrible, exceedingly strong. It had huge iron teeth; it was devouring, breaking in pieces, and trampling the residue with its feet. It was different from all the beasts that were before it, and it had ten horns. I was considering the horns, and there was another horn, a little one, coming up among them, before whom three of the first horns were plucked out by the roots. And there, in this horn, were eyes like the eyes of a man (camera), and a mouth speaking pompous words (such as GPS guide assist, electronics readings, answering services, and or voice activated electronic teller). When the transgressors have reached their fullness, a king shall arise, having fierce features, who understands sinister schemes.
    His power shall be mighty, but not by his own power; He shall destroy fearfully,and shall prosper and thrive; He shall destroy the mighty, and also the holy people. “Through his cunning He shall cause deceit to prosper under his rule; and he shall exalt himself in his heart. He shall destroy many in their prosperity. He shall even rise against the prince of princes (against Christ Jesus who is the only Saviour to human soul); but he shall be broken without human means.

    Revelation 13:11-18
    Then I saw another beast coming up out of the earth, and he had two horns like a lamb and spoke like a dragon.
    And he exercises all the authority of the first beast in his presence and causes the earth and those who dwell in it to worship the first beast, whose deadly wound was healed. He performs great signs, so that he even makes fire come down from heaven on the earth in the sight of men. And he deceives those who dwell on the earth by those signs which he was granted to do in the sight of the beast, telling those who dwell on the earth to make an image to the beast who was wounded by the sword and lived. He was granted power to give breath to the image of the beast, that the image of the beast should both speak and cause as many as would not worship the image of the beast to be killed. He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads, and that no one may buy or sell except one who has the mark or the name of the beast, or the number of his name. Here is wisdom. Let him who has understanding calculate the number of the beast, for it is the number of a man: His number is 666.

    Remember as this was revealed by the one true God and recorded in the Bible more than 3000 years ago! The reason is to give the necessary warning to all who purposely intend to intimidate God and become against Him.

    But the fact of the matter is this is not the only thing God revealed and kept recorded in the Bible to stand as a witness against all who engages themselves in such actions. If after hearing the truth instead of repenting people continues in the pursuing such evil acts as it is recorded in Daniel 4 this tree which is bearing the name of Apollo and Artemis will be cut off so that no evil spirits who used to be considered as gods will never rest on it and no human beings who serve and worship them remain under it! Unless people are willing to repent and accept the gospel message, in this way and manor all the people on earth will know that God alone rules both in heaven and on the earth.
    To know more about this please get a copy of Rabbi Jonathan Cahn book called “The return of the gods”.

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