Status
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Label
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Concept definition
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Code
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Ref type
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Reference ▾
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Supplemental references
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STD 2005/06/07 |
IONOSPHERE |
The <ATMOSPHERE_REGION> of the <EARTH> characterized by ions and free electrons existing in sufficient quantities to reflect electromagnetic waves and located roughly between the <<ALTITUDE_MSL>>s of 70 to 500 kilometres; ionosphere. |
585 |
PR |
[WMO182, I0900, "ionosphere"] |
|
STD 2005/06/07 |
ICE_PELLETS |
<SOLID_PRECIPITATION> of transparent or translucent <PARTICLE>s of <ICE> that are spherical or irregular, rarely conical, and that have an <<OUTSIDE_DIAMETER>> of 5 millimetres or less; ice pellets. <SMALL_HAIL> is a form of ice pellets. |
553 |
PR |
[WMO182, I0150, "ice pellets"] |
|
STD 2005/06/07 |
INTERPLANETARY_MAGNETIC- _FIELD |
The <MAGNETIC_FIELD> in a <STAR_SYSTEM> carried with its <STELLAR_WIND>; interplanetary magnetic field. |
582 |
IR |
[TASC] |
|
STD 2005/06/07 |
IONOSPHERIC_D_REGION |
The lowest daytime <REGION> of the <IONOSPHERE> characterized by weak concentrations of ions and located roughly between the <<ALTITUDE_MSL>>s of 50 and 90 kilometres; ionospheric D-region. An ionospheric D-region is also known as an ionospheric D-layer. |
588 |
IR |
[TASC] |
|
STD 2005/06/07 |
IONOSPHERIC_E_REGION |
A daytime <REGION> of the <IONOSPHERE> characterized by concentrations of O2+ and NO+ ions and located roughly between the <<ALTITUDE_MSL>> s of 85 and 140 kilometres; ionospheric E-region. An ionospheric E-region is also known as an ionospheric E-layer. |
589 |
IR |
[TASC] |
|
STD 2005/06/07 |
IONOSPHERIC_F1_REGION |
A daytime <REGION> of the <IONOSPHERE>, above the <IONOSPHERIC_E_REGION>, characterized by weak concentrations of O2+ ions and located roughly between the <<ALTITUDE_MSL>>s of 120 and 200 kilometres; ionospheric F1-region. An ionospheric F1-region is also known as an ionospheric F1-layer. |
590 |
IR |
[TASC] |
|
STD 2005/06/07 |
IONOSPHERIC_F2_REGION |
A daytime <REGION> of the <IONOSPHERE>, above the <IONOSPHERIC_E_REGION>, characterized by weak concentrations of O2+ ions and located roughly between the <<ALTITUDE_MSL>>s of 200 and 1 500 kilometres; ionospheric F2-region. An ionospheric F2-region is also known as an ionospheric F2-layer. |
591 |
IR |
[TASC] |
|
STD 2005/06/07 |
ICE_SLUDGE |
Spongy whitish lumps of <ICE> a few centimetres in <<OUTSIDE_DIAMETER>> that are floating on the <WATERBODY_SURFACE> of a shallow <SEA>; ice sludge. |
555 |
IR |
[SP35, "sludge"] |
|
STD 2005/06/07 |
ISTHMUS |
A <TERRAIN_STRIP> that is bordered on both sides by <WATERBODY>s and that connects two larger bodies of <LAND>; isthmus. |
596 |
IR |
[SP35, "isthmus"] |
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STD 2005/06/07 |
INLET |
A short, narrow <WATERCOURSE> connecting a <MARINE_BAY> or <LAGOON> with a <SEA>; inlet. |
574 |
IR |
[SP35, "inlet"] |
|
STD 2005/06/07 |
ICE_KEEL |
An irregular, linear, downward extension of <ICE> formed where two moving masses of <ICE> collide on a <WATERBODY>; ice keel. |
551 |
IR |
[SP35, "ice keel"] |
|
STD 2005/06/07 |
ICE_GLAZE |
A coating of <ICE>, generally clear and smooth, formed on exposed <OBJECT>s by the freezing of a film of supercooled <WATER> deposited by <RAIN>, <DRIZZLE>, or <FOG> or possibly condensed from supercooled water vapour; ice glaze. <ICE_GLAZE> is denser, harder, and more transparent than either <RIME> or <HOAR_FROST>. |
550 |
IR |
[GMET, "glaze"] |
|
STD 2005/06/07 |
ISOGONIC_LINE |
An <ISOPLETH> that connects <LOCATION>s of equal magnetic variation; isogonic line. |
594 |
PR |
[FACC, Annex A: ZC050] |
|
STD 2005/06/07 |
INS_ALIGNMENT_PAD |
A designated <LOCATION> where the automated INS instruments of <AIRCRAFT> are reset before taking-off; INS alignment pad. |
575 |
PR |
[FACC, Annex A: GB170] |
|
STD 2005/06/07 |
ILS_TERMINAL_COMPONENT |
An <ATS_ROUTE_COMPONENT> designated for channelling the flow of air traffic via ILS terminal procedures. |
559 |
PR |
[FACC, Annex A: GA049] |
|
STD 2005/06/07 |
ILS_COMPONENT |
An air navigation <COMPONENT> that is essential to the establishment and execution of a precision approach based on an ILS. |
558 |
PR |
[FACC, Annex A: GA048] |
|
STD 2005/06/07 |
INTERNATIONAL_DATE_LINE |
A <LINE> designated as the place on the <EARTH> where each calendar day begins; International Date Line. This <LINE> generally coincides with the 180th meridian but is modified to avoid <LAND>. |
581 |
PR |
[FACC, Annex A: FA110] |
|
STD 2005/06/07 |
INLAND_WATER_ELEVATION |
A <SPOT_ELEVATION> associated with an <INLAND_WATER_SURFACE>. |
572 |
PR |
[FACC, Annex A: CA035] |
|
STD 2005/06/07 |
ICE_SHELF |
A thick sheet of <ICE> usually of great extent, mostly afloat on a <WATERBODY_SURFACE>, with a level or undulating <SURFACE> and attached to <LAND>; ice shelf. The seaward edge is termed an <ICE_CLIFF> (ice front). |
554 |
PR |
[FACC, Annex A: BJ065] |
|
STD 2005/06/07 |
ICE_PEAK |
A rocky peak that may be perpetually covered with <ICE> and that projects above a surrounding <ICE_FIELD>; ice peak. An ice peak is also known as a nunatak. |
552 |
PR |
[FACC, Annex A: BJ060] |
|
STD 2005/06/07 |
ICE_CLIFF |
A perpendicular or steep face of a <GLACIER> or <ICE_SHELF> of considerable <<HEIGHT>>; ice cliff. |
548 |
IR |
[FACC, Annex A: BJ040] |
|
STD 2005/06/07 |
INLAND_SHORELINE |
The <SHORELINE> of an inland <WATERBODY>. |
569 |
IR |
[FACC, Annex A: BH210] |
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STD 2005/06/07 |
INUNDATED_LAND |
<LAND> subject to controlled inundation (for example: flooded by the regulation of the level of a <RESERVOIR>) that is normally associated with permanently flooded ground in which <TREE>s are still standing; inundated land. |
583 |
PR |
[FACC, Annex A: BH091] |
|
STD 2005/06/07 |
IRRIGATION_DITCH |
A <TRENCH> that is constructed for the purpose of irrigation or drainage; irrigation ditch. |
592 |
PR |
[FACC, Annex A: BH030] |
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STD 2005/06/07 |
INLAND_WATER |
A <WATERBODY> that either does not experience or only minimally experiences tidal fluctuations; inland water. |
570 |
IR |
[FACC, Annex A: BH000] |
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