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LAP descr
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Instrument/AMDA/Rosetta/LAP.xml
| ... | ... | @@ -7,7 +7,27 @@ |
| 7 | 7 | <ResourceName>LAP</ResourceName> |
| 8 | 8 | <AlternateName>Langmuir Probe</AlternateName> |
| 9 | 9 | <ReleaseDate>2009-05-20T21:10:13Z</ReleaseDate> |
| 10 | - <Description></Description> | |
| 10 | + <Description> The ESA Rosetta mission to comet 67P/Churyumov-Gerasimenko carried a small but | |
| 11 | + comprehensive set of plasma instruments known as the Rosetta Plasma Consortium (RPC), | |
| 12 | + monitoring the cometary plasma from arrival in August 2014 to end of mission in September | |
| 13 | + 2016. Among the RPC instruments was the Langmuir probe instrument LAP, with chief | |
| 14 | + mission to measure: | |
| 15 | + * Plasma density, ne | |
| 16 | + * Spacecraft potential, Vsc | |
| 17 | + * Electron temperature, Te | |
| 18 | + * Electric field, E | |
| 19 | + * Ion flow speed, ui | |
| 20 | + * Photoemission current, Iph | |
| 21 | + * Wave activity | |
| 22 | + | |
| 23 | + The LAP sensors are two spherical probes, 5 cm in diameter, known as LAP1 and LAP2, one | |
| 24 | +on each of the two booms protruding a few meters from the s/c body. The primary | |
| 25 | +parameters actually measured by the instrument is the current flowing to (or the voltage of) | |
| 26 | +the probes when some bias voltage (or bias current) is applied to it, which are the data | |
| 27 | +transmitted to ground. From these data the parameters above have been derived, for some | |
| 28 | +products also with use of data from RPC-MIP. Do not expect all parameters to be available at | |
| 29 | +any given time. | |
| 30 | + </Description> | |
| 11 | 31 | <Contact> |
| 12 | 32 | <PersonID>spase://CDPP/Person/Anders.Eriksson</PersonID> |
| 13 | 33 | <Role>PrincipalInvestigator</Role> |
| ... | ... |