Flik

In radio astronomy, the unit flik was coined by a group at Lockheed in Palo Alto, California as a substitute for the SI derived unit W cm⁻² sr⁻¹ µm⁻¹, or watts divided by centimeters squared, steradians, and micrometers.^[1]

This is primarily used as a unit of spectral radiance or sterance. While it started out used only in Lockheed, many in the radio astronomy field adopted its use.

References

^ Schlessinger (1994). Infrared Technology Fundamentals, 2nd ed. CRC Press. p. 21. ISBN 9780824792596.

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[1] Schlessinger (1994). Infrared Technology Fundamentals, 2nd ed. CRC Press. p. 21. ISBN 9780824792596.

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