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ExtraClassSylalbus2009jan-AD7FO

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Rev 2.02<br />

SUBELEMENT E2 - OPERATING PRACTICES AND PROCEDURES [5 Exam Questions - 5<br />

Groups]<br />

E2A Amateur radio in space: amateur satellites; orbital mechanics; frequencies and modes; satellite<br />

hardware; satellite operations<br />

E2A01<br />

The direction of an ascending pass for an amateur satellite is from south to north.<br />

Ascending and descending are defined for a satellite’s motion referenced to the equator. Only the north or south<br />

motion is important and not the east-west motion. If the satellite is moving from south to north, then it makes an<br />

ascending pass.<br />

E2A02<br />

The direction of a descending pass for an amateur satellite is from north to south.<br />

As we saw in the previous question, we only need be concerned with north and south orbital motions. Descending<br />

is a north-to-south motion.<br />

E2A03<br />

The time it takes for a satellite to complete one revolution around the earth is the orbital period of that satellite.<br />

E2A04<br />

The term “mode” as applied to an amateur radio satellite refers to the satellite's uplink and downlink frequency<br />

bands.<br />

E2A05<br />

The letters in a satellite's mode designator specify the uplink and downlink frequencies.<br />

The following table summarizes the mode designators:<br />

Mode Satellite Receiving Satellite Transmitting<br />

V/H VHF HF<br />

U/V UHF VHF<br />

V/U VHF UHF<br />

L/U L-Band UHF<br />

E2A06<br />

A satellite operating in the U/V mode would receive signals in the 432 MHz band.<br />

Jack Tiley <strong>AD7FO</strong> Page 17 3/15/2009

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