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Joint Metoc Handboo - IHMC Ontology and Policy Management

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C-METOC Impacts<br />

- C-130 Pathfinder<br />

- C-141 SOLL II<br />

- CASA 212<br />

- MH-53J PAVE LOW III E/MH-60 PAVE HAWK<br />

- MH-60G Shadow Hawk<br />

- Airborne Operations: Personnel<br />

- Airborne Operations: Equipment<br />

• Appendix C. Naval Special Warfare Critical METOC Thresholds<br />

- Parachute Operations<br />

- SEAL Delivery Vehicle (SDV) Operations<br />

- Combat Rubber Raiding Craft (CRRC):<br />

- MK IV Patrol Boat (PB)<br />

- Mini-Armored Troop Carrier (MATC)<br />

- Patrol Boat, Light (PBL)<br />

- Patrol Boat, Riverine (PBR)<br />

- Rigid Inflatable Boat (RIBS)<br />

- High Speed Boat (HSB)<br />

- Patrol Craft (PC)<br />

- MK V Special Operations Craft (MK V SOC)<br />

- Swimmer Operations<br />

C.5 Space Weather Impacts on Systems<br />

Tutorials on space weather <strong>and</strong> impacts are available from 55 Space Weather Squadron<br />

(SIPRNET http://204.20.247.68/index_tutor.htm).<br />

C.5.1 Space-Based Systems.<br />

• Satellite Operation. As satellites are used more <strong>and</strong> more to support warfighters, space<br />

weather effects on satellites become more important. Geomagnetic storms <strong>and</strong> highenergy<br />

particles from solar flares can cause satellites to behave abnormally <strong>and</strong> become<br />

useless for extended periods. In the most extreme cases, these events can cause<br />

permanent failure of a satellite.<br />

• SATCOM. Many theater warfighters are becoming increasingly reliant upon satellite<br />

communications (SATCOM), which is susceptible to scintillation. Scintillation<br />

produces a rapid fluctuation in signal strength similar to the shimmering effect<br />

sometimes visible over a road on a hot summer day. This “shimmering” causes a<br />

SATCOM signal to fade or be lost completely for short periods of time, hindering or<br />

preventing communications. Scintillation is most severe at high latitudes <strong>and</strong> within<br />

about 25 degrees of the equator. In addition to scintillation, radio bursts from solar<br />

flares produce interference (usually for less than an hour) for ground receivers that are<br />

pointed towards the sun.<br />

C-16

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