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Wildlife Techniques > Exam 2- Radiotelemetry > Flashcards

Exam 2- Radiotelemetry Flashcards

1
Q

What can we learn from radiotelemetry?

A
  1. Home range
  2. Mortality
  3. Migration
  4. Movement
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2
Q

There are 3 things one must know when designing a radiotelemetry study, what are they?

A
  1. What do you need?
  2. Potential biases
  3. Telemetry system
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3
Q

What do you need for a radiotelemetry study?

A
  1. Temporal scale
  2. Spatial accuracy
  3. Other info
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4
Q

What are some potential biases in a radiotelemetry study?

A
  1. Animal selection
  2. Transmitter effects
  3. Location error
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5
Q

What is included under a telemetry system?

A
  1. VHF (very high frequency)
  2. GPS
  3. Satellite PTT (platform terminal transmitters)
  4. Light-level geolocators
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6
Q

What does a transmitter consist of?

A
  1. VHF circuit board & quartz crystal.
  2. Transmitter antenna
  3. Battery
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7
Q

Generally, wildlife studies use what circuit board (MHz)?

A

148-152 MHz
162-168 MHz
170-173 MHz

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8
Q

What does it mean if the circuit & battery are “potted”? How is this beneficial?

A

They are encased in epoxy resin or acrylic.

It protects them from moisture and shock.

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9
Q

What should be considered when designing a transmitter?

A
  1. Minimizing the negative impacts on animals
  2. Required signal duration
  3. Other options needed
    • Mortality or Temperature-sensitive switches
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10
Q

What are examples of receiving systems?

A
  1. Handheld
  2. Vehicle-mounted
  3. Fixed tower
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11
Q

What are the types of antenna designs?

A
  1. Whip or dipole
  2. Loop
  3. Adcock (“H”)
  4. Yagi
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12
Q

What is the limitation of the whip or dipole antenna design?

A

Nondirectional

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13
Q

What is the limitation of the Adcock (“H”) antenna design?

A

Good directional, but 2 null peaks 180 degrees from each other.

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14
Q

What 2 components associated with the Yagi antenna design, tune to frequency?

A

Length and spacing of elements

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15
Q

What are the VHF Telemetry field procedures?

A
  1. Homing to transmitter

2. Triangulation

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16
Q

Pros & Cons of GPS Telemetry

A 
PROS:
 1. Spatial accuracy (up to 20m)
 2. Temporal resolution
 3. Labor
CONS:
 1. Cost
 2. Data retrieval
17
Q

What system is satellite telemetry associated with?

A

PTT (Platform Terminal Transmitters)

18
Q

What are PTT based on?

A

NOAA Argos system

19
Q

What does PTT use to estimate distance?

A

Doppler shift

20
Q

Pros & Cons of Satellite Telemetry?

A 
PROS:
 1. May be only feasible technique
 2. Real-time results with minimal labor
CONS:
 1. Cost
 2. Battery life
 3. Accuracy
 4. Frequency

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