Deployment Calculator

Parameters you'll likely want to change are shown in bold. Calculated/output values are shown in italics. Constant/measured values unlikely to change are shown in grey.

System

RBRcervello
RBRcervata

Batteries

Internal battery pack
None

120 Alkaline D cell (10s12p)
120 LiSOCl2 D cell (4s30p)

48 Alkaline D cells (Carousel, 12s4p)
48 LiSOCl2 D cells (Carousel, 4s12p)
56 Alkaline D cells (Shrink-wrapped, 8s7p)
56 LiSOCl2 D cells (Shrink-wrapped, 4s14p)

External battery pack
None
8s7p Alkaline
4s14p LiSOCl2

Battery capacity: Wh

RBRcervata's Parameters

Instrument's baudrate:

Additional directly connected instrument:

Deep sleep period: Seconds

Instrument

Instrument deployment lifetime is calculated separately in Ruskin. However, in order to calculate the modem duty cycle (a prerequisite for estimating its power consumption), we must know some basic information about the instrument to know how much data it will produce.

Number of instruments:

Sample rate: Hz

Number of channels:

Direction-dependent sample reduction: %

Efficacy of direction-dependent sampling depends on configuration and deployment conditions. See the Logger3 command reference for details.

Data rate: bytes/second

Instrument attachment:

Average power consumption: W

Additional Directly Connected Instrument

Sample rate: Hz

Number of channels:

Data rate: bytes/second

Average power consumption: W

Instrument Communication

The means of communicating with the instrument significantly impacts power consumption. Only the communication hardware connected to the Cervello is considered, as the communication hardware connected to the instrument draws power from the same source as the instrument, not the data controller.

Average power consumption: W

GPS

Interval: seconds

Activity duration: s; power consumption: W

Average power consumption: W

Weather Station

The Airmar 200WX measures tilt, air temperature, wind speed and direction.

Enabled:

Weather number of channels:

Sampling burst speed: Hz

Sampling burst duration: s

Sampling burst period: s

Data rate: bytes/second

Average power consumption: W

Telemetry

Interval: seconds

Telemetry compression reduction: %

The default reduction value – 80% – is based on empirical data collected across multiple deployments. It encompasses the effects of not only compression, but also real-world telemetry overhead from the messaging protocol (connection metadata, diagnostic data, message delimiters) and any repeated data transmitted due to telemetry drops/outages. Strictly speaking, the actual compression (quantization + differential encoding) is significantly more effective, but to show only the compression ratio would be a misrepresentation of the true amount of data transferred.

For GSM, use “-5%”: no compression is used, but there is still protocol overhead which increases the payload size.

Data rate: bytes/telemetry session

Modem:

Configuration/dialing activity duration: s; power consumption: W

Dialed, transmitting + receiving power consumption: W

Duty cycle: %

Average power consumption: W

Single-board Computer

Average power consumption: W

Overall

Deployment life: days

Average power consumption: W