Coming from the prefix "tele" (distant) and the suffix "metry" meaning "the process, art, or science of measuring", telemetry is no more than simply "distance measurements".

Hint: a meter is a unit of measurement

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FCC 97.3(a)(2)(2) Amateur radio services are defined as the following three services The amateur service, the amateur satellite service and the radio amateur civil emergency service.

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FCC 97.3(a)(44) Telecommand station. An amateur station that transmits communications to initiate, modify or terminate functions of a space station.

Tip - The only answer that contains the words “space station”

Tip2 - A “telecommand” station must be making commands. The correct answer is the one that includes a list of potential commands, “initiate, modify or terminate”.

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FCC 97.3(a)(16)) Earth station. An amateur station located on, or within 50 km of, the Earth’s surface intended for communications with space stations or with other Earth stations by means of one or more other objects in space.

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Part 97.207 Space Station: begins with: (a) Any amateur station may be a space station. A holder of any class operator license may be the control operator of a space station, subject to the privileges of the class of operator license held by the control operator. (emphasis added)

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From Part 97.207 Space Station:

(b) A space station must be capable of effecting a cessation of transmissions by telecommand whenever such cessation is ordered by the FCC.

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The correct answer is ALL HF bands 40 Meters and above EXCEPT for 30 meters.

From §97.207-

(c) The following frequency bands and segments are authorized to space stations:

(1) The 17 m, 15 m, 12 m, and 10 m bands, 6 mm, 4 mm, 2 mm and 1 mm bands; and

(2) The 7.0-7.1 MHz, 14.00-14.25 MHz, 144-146 MHz, 435-438 MHz, 2400-2450 MHz, 3.40-3.41 GHz, 5.83-5.85 GHz, 10.45-10.50 GHz, and 24.00-24.05 GHz segments.

Since this question specifically mentions HF amateur bands, this limits our options to those between 3 Mhz and 30 Mhz. In the list given by the FCC regulations, that translates to parts of 40 m Band, (7.0-7.1 MHz), parts of the 20 m band (14.00-14.25 MHz) and the 17 m, 15 m, 12 m, and 10 m bands. This is another way in which the 30 meter band is an odd HF band. In addition to prohibiting space stations, the 30 meter band has a lower than standard power limit of only 200 PEP and it generally only allows narrow-band digital modes and CW.

An easy way to remember this one is that every year has 12 months (12m band) but every month doesn't have 30 days. There is only one answer that has 12m without 30m - OR - There's always 4 even and 2 odd balls in space. 4 even numbered bands and two odd numbered bands. - KF4IRE

The only answer with 10, 12, 17 meters

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From Part 97.207 Space Station::

(c) The following frequency bands and segments are authorized to space stations:

...

(2) The 7.0-7.1 MHz, 14.00-14.25 MHz, 144-146 MHz, 435-438 MHz, 1260-1270 MHz, and 2400-2450 MHz, 3.40-3.41 GHz, 5.83-5.85 GHz, 10.45-10.50 GHz, and 24.00-24.05 GHz segments.

144-146 MHz covers a portion of the 2 meter band.

For your general education, note that the following spectrum is also authorized to space stations:

(1) The 17 m, 15 m, 12 m, and 10 m bands, 6 mm, 4 mm, 2 mm and 1 mm bands;

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Part 97 : Sec. 97.207 Space station

Part 97 Sec. 97.207 Space station (c) The following frequency bands and segments are authorized to space stations:

(1) The 17 m, 15 m, 12 m, and 10 m bands, 6 mm, 4 mm, 2 mm, and 1 mm bands; and

(2) The 7.0–7.1 MHz, 14.00–14.25 MHz, 144–146 MHz, 435–438 MHz (70 cm) , 2400–2450 MHz (13 cm), 3.40–3.41 GHz, 5.83–5.85 GHz, 10.45–10.50 GHz, and 24.00–24.05 GHz segments.

Silly memory tool: In 1970 (70cm) Apollo 13 (13cm) had a problem.

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FCC 97.211(a)Any amateur station designated by the licensee of a space station is eligible to transmit as a telecommand station for that space station, subject to the privileges of the class of operator license held by the control operator.

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FCC 97.209(a) Any amateur station may be an Earth station. A holder of any class operator license may be the control operator of an Earth station, subject to the privileges of the class of operator license held by the control operator.

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