Electrical Power Systems

Six iROSA solar arrays in the planned configuration will augment the power drawn from the existing arrays on the International Space Station. Power channels shown are 1A, 2B, 3A, 3B, 4A, and 4B.

The ISS Power Channel Display, visualizes the solar array telemetry for the International Space Station.

🔋 Overall Layout

The ISS has eight solar array wings, grouped into four pairs per truss segment:

• Left (port side): 1A, 1B, 3A, 3B

• Right (starboard side): 2A, 2B, 4A, 4B

Each labeled block (1A, 1B, etc.) corresponds to a specific power channel.

These arrays track the Sun to generate electrical power for the ISS.

🧩 Acronyms and Key Parameters

⚡ The Numbers Next to Each Array

For example, for 1B on the top left:

• 194.41 → Array rotation or Beta angle (sun incidence or pointing data).

• 0.00A → No current draw at that time.

• 151.30V → Voltage output (within nominal range).

Similarly, for 4B (top right):

• 359.87° → nearly one full rotation alignment.

• 0.00A → idle.

• 151.25V → typical bus voltage

🧠 Summary of the Display

This screen is showing:

• 8 solar array wings (1A–4B) with voltage, current, and pointing angles.

• PSARJ and SSARJ angles in the center (157° and 202°).

• Power generation status (currently “0 W”).

• Color bars visualizing illumination levels or relative output.

It’s likely part of the ISS Power and Thermal Control training interface or ISS Mimic display showing how the station maintains sun-tracking alignment.