@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix ns0: <http://gcmd.gsfc.nasa.gov/kms#> .

<https://gcmd.earthdata.nasa.gov/kms/concept/78af5114-336b-4e5b-98bc-59db351bdcef>
  skos:changeNote """2015-04-07 14:18:43.0 [mpmorahan] Insert Concept 
add broader relation (MMS SDP [78af5114-336b-4e5b-98bc-59db351bdcef,157849] - Probes [a172d205-122a-4a8b-b73a-52c1d44d6aaa,157845]); 
""", """2015-04-07 14:24:46.0 [mpmorahan]  
insert AltLabel (id: null
text: Spin-plane Double Probe
language code: en); 
insert Definition (id: null
text: MMS carries two sets of doubleprobe
instruments. Each measures the
voltage between two electrodes to
determine the electric field. As the field
changes are quite small, the electrodes
must be set as widely apart as possible
to provide a robust signal. Thus the
double probes sensors reside at the
ends of very long booms that deploy
away from the main body of each
observatory after they are launched.

The Spin-plane Double Probe, or SDP,
consists of four 200-foot wire booms
with spherical sensors at the end.
These booms stick out of the sides of
the observatories. The Axial Double
Probe, or ADP, is aligned through the
center of each observatory, along its
spin axis. It is made of two 30-foot
antennas. The ADP is controlled via a
separate electronics box, called the
Axial Electronic Box or AEB.

Gathering accurate measurements
while each spacecraft spins around is
no small feat and the accuracy of the
probes is continually checked and
calibrated against measurements
made by EDI.

The SDP is the product of a
collaboration between the University of New Hampshire, the
Royal Institute of Technology in
Sweden, and the University of
Colorado in Boulder. The ADP was
provided by the University of Colorado.
language code: en); 
""" ;
  ns0:altLabel [ ] ;
  skos:definition """MMS carries two sets of doubleprobe
instruments. Each measures the
voltage between two electrodes to
determine the electric field. As the field
changes are quite small, the electrodes
must be set as widely apart as possible
to provide a robust signal. Thus the
double probes sensors reside at the
ends of very long booms that deploy
away from the main body of each
observatory after they are launched.

The Spin-plane Double Probe, or SDP,
consists of four 200-foot wire booms
with spherical sensors at the end.
These booms stick out of the sides of
the observatories. The Axial Double
Probe, or ADP, is aligned through the
center of each observatory, along its
spin axis. It is made of two 30-foot
antennas. The ADP is controlled via a
separate electronics box, called the
Axial Electronic Box or AEB.

Gathering accurate measurements
while each spacecraft spins around is
no small feat and the accuracy of the
probes is continually checked and
calibrated against measurements
made by EDI.

The SDP is the product of a
collaboration between the University of New Hampshire, the
Royal Institute of Technology in
Sweden, and the University of
Colorado in Boulder. The ADP was
provided by the University of Colorado."""@en ;
  skos:prefLabel "MMS SDP"@en ;
  skos:inScheme <https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments> ;
  skos:broader <https://gcmd.earthdata.nasa.gov/kms/concept/a172d205-122a-4a8b-b73a-52c1d44d6aaa> ;
  a skos:Concept .

<https://gcmd.earthdata.nasa.gov/kms/concept/a172d205-122a-4a8b-b73a-52c1d44d6aaa>
  skos:prefLabel "Probes"@en ;
  a skos:Concept ;
  skos:narrower <https://gcmd.earthdata.nasa.gov/kms/concept/78af5114-336b-4e5b-98bc-59db351bdcef> .