It could also have been overlooked by the supervising team/quality control team considering that all the people working for that are experts in their fields.ĭaily life experience that involves concepts of physical quantities and measurements are telling the time, using money to buy commodities, weighing yourself to monitor if your gaining some fats or not, rising a bus, etc. The decision on what unit of measurement to use must be based on commonsense, in my place we usually used a metric system but in another place, the imperial system is widely used. It could be that the team working on the data on the ground and monitoring the spacecraft is different from the people who worked on the software in the spacecraft, resulting in a miscommunication of what unit of measurement must be used. The data used for this is the processed data by a software program in the spacecraft. In the video, it is stated that as the spacecraft is launched, there is a navigation tea that will constantly monitor its angular momentum to adjust its trajectory. Their experts had done such mistakes probably due to many things. This led to the spacecraft reaching 105 miles closer to the Martian surface which is a very low altitude for the spacecraft to fire its main engine for the orbit insertion burn that was designed to put it into an elliptical orbit, nothing happened and NASA lost contact with the said spacecraft. This resulted to the spacecraft's trajectory being off by a factor of 4.45 Newtons for every trusters fired.
However, the processing software on the ground uses the imperial lb.s (pound-seconds) unit of measurement. The software on the spacecraft measured impulse or the changes by trusters in N.s (newton-seconds), a metric unit of measurement. NASA lost a spacecraft named Mars Climate Orbiter mainly because the processing software in the spacecraft and the processing software on the ground were using two different systems of measurements.
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