Power Budget

Based on the orbit characteristics of FloripaSat (FloripaSat’s Project Description) and Solar panels (EPS Session), the solar panels input power is:

• Maximum peak solar panels input power: 4.1861W
• Minimum solar panels input power (eclipse): 0 W
• Average solar panels input power: 2.1611W

Considering that maximum input power loss is 0.429W, the FloripaSat’ average input power is: 1.7321W. Besides the solar panels, the FloripaSat has two batteries that supply up to 22.2Wh.

Using this survey we can estimate the power budget of the FloripaSat. The spreadsheet was made using the component information contained in its respectives datasheets. The budget was splitted on static and dynamic. The static consumption refers to components and features that will be always on or do not change its consumption profile over time. The dynamic consumption refers to components and features that have a variable consumption, according to the satellite status or mission needs. So we can infer that the static budget will be used to estimate the basic/normal operation power consumption and the dynamic budget can be used together to estimate the mean and peak power consumption.

The maximum estimated EPS static power budget is approximately 0,43W. The dynamic consumption could reach 5,46W but the batteries heater accounts for 4,8W of this value.

The maximum estimated OBDH static power budget is approximately 0,11W. Adding the dynamic power budget we get approximately 0,24W of mean consumption and could reach 2,59W in a peak.

The maximum estimated TT&C static power budget is approximately 0,07W. Adding the dynamic power budget we get approximately 0,08W of mean consumption and could reach 2,15W in a peak.