Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

# Tag Info

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This may answer some of your questions, but not all. Additional information may exist in the book. Also take into account that both Voyager spacecrafts could perform the same measurements before they diverged. The results could be compared. Following excerpts are from the book Deep Space Craft: An Overview of Interplanetary Flight, Dave Doody, Springer ...

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There are currently (June 2018) two new papers (links may be paywalled): "Organic matter preserved in 3-billion-year-old mudstones at Gale crater, Mars", Eigenbrode et al., Science 360, 1096–1101 (2018) "Background levels of methane in Mars’ atmosphere show strong seasonal variations", Webster et al., Science 360, 1093–1096 (2018) The first is looking for ...

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For integration into software, I would recommend the SPICE toolkit, available with interfaces for C, Fortran, IDL, and MATLAB, and the many SPK kernels that can be loaded into SPICE containing the most accurate ephemerides available for the planets and their satellites. For specific small bodies you can use the HORIZONS system to generate SPK kernels, or you ...

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The degree of orbital shadowing experienced by an orbiting object with small orbital altitude is determined by its beta angle (normally used in reference to LEO objects but the concept applies to lunar orbiters as well). The angle is taken between the satellite's orbital plane and the vector to the Sun. Depending on the value of the beta angle, a satellite ...

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Two items of note: Luna 9's initially released pictures came from scientists at Jodrell Bank Observatory in England, which could be received because they were in a standard format. This came ahead of the official release of the first photographs from the surface of the Moon. Apollo 11 signals were received and decoded by Amateur Radio operators. Many ...

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Once in orbit, always in orbit doesn't apply to the moon--the gravity is too uneven. Stuff left in lunar orbit generally crashes into the moon after a while. (All the Apollo landers that were left in lunar orbit are gone by now.) In addition to observing the crash they also wanted to control the crash--make sure it didn't happen on top of anything sitting ...

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LADEE was going to run out of fuel, and they wanted - and succeeded - to collect data of Moon's atmosphere and levitated dust. (LADEE means 'Lunar Atmosphere and Dust Environment Explorer'.) Fuel is needed to compensate orbital degradation due to Moon's non-symmetric gravitational field. Online communication was possible due to superfast laser data ...

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The "Flight Evaluation Reports" from the Apollo missions have a number of data plots and tables that may help you. Bob Braeunig developed a simulation that matched the Apollo 11 flight report rather well, which you may want to refer to; unfortunately he seems to have taken it down but it's available on archive.org. You can probably find similar data for ...

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The source of the data is the Radiation Environment Monitor. Lawrence S. Pinsky is listed as co-investigator. This Radiation Environment Monitor demonstration will provide information that is required to enable the design of an operational active personal space radiation dosimeter. The objectives of the experiment are to demonstrate the viability of ...

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Section 4.1 on page 8 of the original report on the phenomenon discards this possibility, albeit indirectly: The Kepler light curve for KIC 8462852 is unique, and we have thoroughly explored the raw data for defects/instrumental effects, which could cause the observed variations in KIC 8462852’s flux. We use the P Y K E software tools for Kepler ...

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Kepler rolled between the quarter dates found at this site. At first glance, they don't seem to correlate, although I need to do more work to actually line it up. As Kepler rolls the data between data releases, it's possible to look at whole datasets, and see if they occur at a common point in the cycle. I can tell you the following: A dip occurred at the ...

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note: Here are two examples of "hijacked signals" that include "public release of the images or data that included the admission that it is 'stolen' or 'hijacked'." I am sure there are a few more. One is backyard audio and the other is intercepted video! From Lunar Eavesdropping in Louisville, Kentucky by C. Graney, Jefferson Community & Technical ...

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There is no circular orbit that has a share of 50:50 between night and day. The possible times are a bit less than 50% to 0% night or, respectively, a bit more than 50% day to 100% day. The two extreme cases are: an orbit that is aligned with the terminator (the border between night and day on the surface) is in perpetual daylight. an orbit that passes ...

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Use this page to generate SPICE kernels for the bodies of interest, and then use SPICE routines to calculate whatever you like to your heart's content. Aarrr. I don't be knowin why ye be reinventing th' wheel. Alrighty ya scurvy bilge rat, here it be: $$x=a\left(\cos\tau-e\right)$$ $$y=a\sqrt{1-e^2}\sin\tau$$ $$z=0$$ That be givin it t' ye in th' plane. ...

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A quick search on Google Scholar turns up 106 articles published in 2018 using Huygens' data. So I'd say the data is still being analyzed and used.

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OSIRIS-REx is packed all full of good stuff. I'll throw together a quick list of the scanning ones you're interested in. Also of note is that the entire spacecraft will be making that scanning motion shown in the gif, so as the asteroid rotates, all of these instruments will be able to have full coverage of it. OSIRIS-REx Visible and Infrared Spectrometer ...

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Signals are not repeated, but instead coded in a special way that allows to reconstruct the original data on the receiver side in presence of noise/errors. It is called forward error correction. FEC schemes are more efficient than just blindly transmitting the same data twice (though they of course increase the total amount of data that has to be ...

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Never. The goal of PubSpace as stated by NASA themselves: NASA is using PubMed Central (PMC) to permanently preserve and provide easy public access to the peer-reviewed papers resulting from NASA-funded research. Beginning with research funded in 2016, all NASA-funded authors and co-authors (both civil servant and non-civil servant) will be required to ...

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NASA requires all missions to release the raw data on a regular basis, in particular to the Planetary Data System. ESA releases their data to the Planetary Science Archive. Russia releases it's data to the Solar System Data Archive. Other organizations are found under the umbrella "International Planetary Data Alliance", which has a whitepaper here giving ...

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It all depends on how you define "dayside" and "nightside", and how you define "entering" or "exiting" either one of them for a satellite. I suppose a big part of the confusion comes from this statement: Being in a polar orbit, Chandrayaan-2 enters the dayside of the Moon crossing the north pole, traverses through the dayside and enters the nightside ...

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These are standard terms used by the Planetary Database System. MSSS provides some explanations of these terms. Product ID- Each product (image) has a unique id, if you know the exact image, put this one in. Coordinate Range- Range to the coordinates from the spacecraft. Incidence Angle- This is the angle that the sun is to the surface. A low angle means ...

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Addressing multipath has long been a challenge with regard to GPS. Carrying a GPS-enabled smartphone toward the heart of a large city results in GPS-estimated positions and altitudes that bounce around. The problem is signals reflecting off of buildings, sometimes multiple times. Those reflecting surfaces result in multiple paths that a GPS signal can follow ...

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The CYGNSS spacecraft will use a technique called "Delay Doppler Mapping". Each satellite will be equipped with a Delay Doppler Mapping Instrument (DDMI), which is capable of receiving four DDM's at once. DDM is only slightly different from standard Radar Altimetry, which measures the distance to an object by tracking how long it takes a signal bounced off ...

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Elon Musk gave a press conference where he mentioned that it isn't returning any data. You can see the full press conference here, and the question where he answers what data the car is collecting occurs at around 15:00

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Several reasons: The space probes are orbiting around the moon, below a certain altitude, and definitely at altitudes as low as 1 - 2 miles, fuel must be used to keep it in orbit. After it has completed its mission, there will be no/little more fuel left for it to escape the moon's gravity pull again. (Quote from previous reference At the time of impact, ...

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I've been searching around, and found some piecemealed data. Here's what I can find. Some very limited data is available from the Planetary Data Archives, mostly in the form of cooperative missions with NASA I found some data on this website, from the Space Research Institute Some of it appears to be hosted on a private network similar to the WW2, known as ...

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All NASA data is to be released to the public within 1 year of it's collection, and is released to the Planetary Data System. The 1 year is to give the scientists a chance to publish on the research they have worked long and hard to colelct.

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Upon reading "An empirical examination of WISE/NEOWISE asteroid analysis and results": As I understand it, nothing is wrong with the data obtained from the missions. What is wrong is the interpretations/inferences drawn from the data. As I understand it, the data consists of multi-spectral analysis of various asteroids. From that data, the sizes of those ...

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Just a single repetition would not help. If there is a single error within those two data blocks, you do not know where the error is and have no chance to correct the error. If the data is transmitted three times and you get two identical copies, you may assume those identical copies are correct and one or more errors are in the third block. A better ...

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