Drew Kerman

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About Drew Kerman

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    KSA Operations Director

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  • Website URL http://www.kerbalspace.agency

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  1. There may be a numerical maths thing here I don't quite understand but I just thought about the fact that the game is getting all its initial data from the SFS file... so it should stand to reason that importing data from the SFS file into KSPTOT should still yield the same results as the game shouldn't it?
  2. Don't forget the MFMS time constraint. Just a reminder - no rush. For these 50-run sequences I'm still doing it's not a big deal but when I finish up and select the routes I really want to crunch on in a few weeks it will really help to have this additional constraint to clamp down on things for 500-run sequences
  3. I never noticed this edit until now. Forum doesn't notify me if you tag me on an edit it seems. No error chime sounds, nothing shows up in the log - just loads the vessel selection window with an empty vessel list. Well, I will be updated to the latest KSP version by the end of the year so I will just wait until I get around to doing that.
  4. The Kerbal Space Agency: Let's Go Back to Space!

    too late, and there is no nuclear power of that type in my story. yet? We'll see
  5. would you also have to remove and re-add the wheels in the VAB/SPH after installing the stock patches?
  6. The Kerbal Space Agency: Let's Go Back to Space!

    Operations Summary – Week of 12/4/17 Images from the Week Gallery Launch Readiness Heads Into Final Week Things are ramping up for our Mk5 Block I launch next week after the final part of the rocket arrived earlier today – our newly-designed first stage booster which was tested last week. The third stage was completed first last month as the parts were already all on hand for assembly. A thrust-adjusted second stage booster was delivered at the end of last month and was completed earlier this week. The two stages were mated on Thursday and the first stage booster has already begun assembly. You can see in this image that the third stage no longer sports any fins, but harder to see is that the second stage fins no longer have any pitch. Only the first stage fins will be pitched to spin up the rocket during its much longer 31s boost period. Next week the whole rocket will be stacked together and final integration will see the attachment of payload fairings. Roll out is scheduled for the day prior to launch on 12/13. Everyone here is excited to finally be sending up another rocket into space! Genesis & KerBalloon Missions Captain Jebediah was on rotation for a Civvie flight early in the week that took him out over the West Shore Desert to collect air sample data with the Atmospheric Fluid Spectro-Variometer’s upgraded sensor suite. The data will help scientists determine how much dust is present aloft, as air particles are the genesis of snow, ice and rain. It could be that this region plays a more important role in our local weather patterns that previously thought, and through this we could get a better understanding of why the desert exists in that area. Improved weather forecasts coming? Possibly. Specialists Bill & Bob were deployed to Ockr once again for a high-altitude balloon release, although this time it was done from an area where we were sure the balloon would be able to see the Ockr radio tower. Ockr will be the future hub for our Deep Space Network – all data from Aerkibo and ATN Central/North/South will be routed through here so it was important to test how well data from this mission was transferred to us at KSC. The mission went off without a hitch, relay through the ground fiber optic cables was 100% on point at all times. Both programs have suspended contract operations next week. Genesis plans to test some rudimentary flight assistance software (no one is calling it an autopilot yet) while KerBalloon works to support the Progeny launch with high-altitude balloons to keep track up upper-level winds. Although these balloon releases are not official Kerballoon program missions, resources dedicated to them are mostly the same and would otherwise detract from any planned contracts. Asteroid Makes Several Passes Through Our Atmosphere Before Breakup The asteroid designated LPL-416(E) dove as deep as 24km ASL into our atmosphere on Wednesday, making 3 or 4 passes before observatories at Ockr and Kravass could no longer find it. Large chunks were spotted braking off the stony asteroid after only its second pass, meaning although it was large it could have been comprised of several smaller asteroids that clumped together loosely. It’s suspected that the asteroid broke apart completely on either its 3rd or 4th pass – after the 3rd pass it came around again so quickly no observatories could see it before its 4th pass. The land under its 3rd pass has been noted for a possible future survey to try to find any meteorites. Unlike the first asteroid that made such a passage, Pilirani, this asteroid was not given a name or Flight Tracker entry. It will still play an important role however in helping scientists predict aerobraking for future spacecraft through Kerbin’s atmosphere. You can see a full timeline of events here. ATN Database Update The weekly update for the Asteroid Tracking Network database is available here, containing 1,309 asteroids and 29 updated with new observation data. We have also begun to include the KSPTOT Matlab file that contains all the detailed orbital data for each asteroid, should anyone want to make some plots of their own. Celestial Snapshot of the Week This photo of the aurora was taken from above Sheltered Rock, which is not usually privy to such displays of celestial magnificence. We have known of the existence of these sky lights over the north and south poles but rarely to they appear at latitudes this low. Only a few dozen times before the Sea Ring impact were they able to be seen in non-polar regions and once almost 1000 years ago is there a record of them being visible near the equator. We still don’t fully understand their existence although some scientists have made a case for a link with sun activity. We expect the northern and southern lights to be a topic of study for future space probes. From the Desk of Drew Kerman (Out of Character Behind the Scenes stuff)
  7. right No, this has always been a thing. It's a separate issue from the R2015b vs, R2017b precision issue - I made a mistake in thinking it was related to this Yup So the ironic thing is that I'm using the SFS file because by refusing to ever load the vessel into the flight scene I am forcing it to stay on rails throughout all of its orbital activity and my hope was that this would keep things more consistent with what KSPTOT was calculating. So here is a possible workaround - Load to a different vessel, and then use KSPTOTConnect to pull precise orbital data for Alaba from the list of vessels in the game (rather than using the Active Vessel option)? Problem here is that this seems to be bugged (I think it has been for a while). Even with the latest R2017b build you linked me to when I load a craft in flight and choose to select an orbit from KSP it pops up a load dialog then shows the Load from SFS window with no craft listed. Note I'm still on KSP v1.2.2
  8. alright I ran both executables without any obvious issues and got the same results for both after propagating the original orbit out two Mun encounters to its present state in the game: Epoch: 37877638.8568547 SMA: 16115.4036362252 Ecc: 0.315899270667825 Inc: 130.799241992445 RAAN: 106.535659985894 Arg Peri: 91.732534984549 True Anom: 88.303484758255 Both mission files can be found here. These are the values I get from importing the current orbit via the SFS file (available as an Other Spacecraft in the 2017 mission file): Epoch: 37877597.156481 SMA: 16120.7076370317 Ecc: 0.316634850921572 Inc: 130.807237794599 RAAN: 106.53544658843 Arg Peri: 91.677156954846 True Anom: 88.394396339316 So close! Which is why I'm suspecting some kind of precision issue being compounded over time
  9. Yea just do this and you're good to go: @PART[*]:HAS[~category[none],#tags[*cck*]]:FINAL { @category = none }
  10. Can you link me to the KSPTOT version that is? I've completely lost track. Will it run okay with the new runtimes I downloaded for the latest pre-release or will I have to roll back those as well? I think I just have to see what you've changed in order to be sure I'm understanding the usage of Cd*A
  11. hey! I just noticed that the tooltip that pops up when you hover over the Drag Coefficient input box in the state editor that states the value is actually Cd * A for FAR/NEAR users. So you already have a note in there it could probably just be made more obvious? I'm progressing through an asteroid aerobrake on multiple passes now tho and getting good results from the Aerobrake state. Will share the details after the event is over. Also I just noticed you can't set a line color for Aerobrake events
  12. Additional request - is it possible to detect the Genetic Algorithm window is open while the MFMS is running so if you choose to output a Graphical Analysis it opens in a separate window? Currently it tries to plot in the already-open GA window. I sometimes like to pause my current MFMS run to do something quick in MA. For now my workaround is just to have it generate a tabular text file - thankfully plotting in the open window doesn't seem to adversely affect the MFMS run
  13. Yea I recreated it here. Using data I recorded back when this event happened, I have the Inital State being the asteroid's orbit right after a previous aerobrake pass, which is why it seems to go all the way around. I already know the SMA after its next aerobrake pass was 2265.58365678296 so I just worked up from the default 0.2 to a Cd that gave me close to that result Here it is. The Initial State comes from selecting Event 5 in my Alaba propagation file and choosing Copy Orbit After Selected Event - this gives me the expected orbit after leaving Mun's SOI for the second time. The Other Spacecraft orbit is from importing the actual current orbit from the SFS file. Yup that sounds right
  14. [1.3.0] Kerbalism v1.2.9

    he's been pretty good of keeping us posted of his absences in the past, which has made me worry a bit that no one's heard from him and he never said he was going to be away for several months (that I recall)