Lol I didn ' t even notice that . Classic nope <| sep |> I like Ashiok so far . comes down early , and is great to curve into Atraxa . Her ultimate is pretty crippling , but I wouldn ' t consider her an autoinclude or anything . There are better walkers to run for sure . but I wanted to keep it to about 12 total . My deck is not meant to be super cutthroat , just casually strong . <| sep |> You know no boundaries . <| sep |> Come one , come all ! The Meat Grinder business will process all fat sheeps may they be human , Yao , andor Mo . <| sep |> If you ' re on console , it is much cheaper on Amazon right now . <| sep |> Note I ' m not working for ESA but I have worked on satellite software before . But never on anything supposed to go back to a planet . The only information I have for the technical details comes from public source from internet . Also the current report is very short , and does not offers lots of details . Maybe the system assumes that the , probably bottom mounted doppler altimeter , is unreliable when the bottom of the probe isn ' t facing towards the ground ? Yes , it ' s a possibility . The way the IMU data is used is usually to start from a know attitude and then you integrate the rotation speed over the time period . If you have bad IMU data , you integrate bad value and have a bad estimation of the attitude . But I ' m surprised by two thing if this is the case 1 . usually when you get saturated value from an equipement especially complex equipment , and IMU are complex you also get a flag telling you that the data is incorrect . Didn ' t they have one , or didn ' t they check it ? If it ' s the problem , this data should not have been used 2 . the problem could also have been found when seeing a negative altitude value , which don ' t have a physical sense . On the other hand , it also don ' t really make sense to check that the altitude is positive , because you probably cannot have a smart recovery for it , you need to catch the problem earlier . what do you do if you see a negative altitude ? How can you recover from this information alone ? You cannot really do that attitude , not altitude . Attitude is the 3 D orientation of the spacecraft , not his position . Rollpitchyaw in a plane . Aren ' t there redundant inertiamessurement units on bord to filter out garbage data ? According to Space Flight 101 edm , yes , they have redundant IMU two times 3 axis gyro and two times 3 axis accelerometers I don ' t know if they are in hot or cold redundancy , I would guess hot redundancy for such a small period . One of the unanswered question in the ESA page is to know if the event they are speaking about correspond to a real attitude change of the spacecraft in which case both IMU would be saturated , or if it is an hardware problem of one of the IMU . in which case , they couldshould have been able to isolate the faulty one and use the good one , if they were in hot redundancy hot redundancy both on at the same time , cold one on , one off , and you switch in case of failure Don ' t they simulate that stuff serveral million times ? Many times yes . A million times , it ' s doubtful . And also you may have different possible type of simulation , more or less complex in the simple simulation , you put a very simple model of your sensor and actuator , run everything on a normal computer . In the most complex simulation , you actually plug the real equipments for example the IMU , the thrusters to the real on board computer , you put the equipments in some test mode where you can tell him simulate the dialog as if you were rotating at that speed , you plug everything to a simulator that speaks to the IMU , read when the thruster are thrusting , and simulated the descend . You can run a lot of simulation of the simple simulator part , because it may run fast , but once you start to plug real equipment , real on board computer , you are usually bound to run everything at normal speed , that is one second of simulation one second of real time . You cannot find all the problems in the simple simulatorYou could also have intermediate simulation , where you you get part simulated and parts closer to real equipment , and so on . But you always have to compromise between complete realistic model which you never reach actually , except once you are in space . and speed and more speed more simulation case possible