= Joan Wrobel
{c}
<Joan Wrobel> explains the sensitivity of <radio interferometers> through the relation between source signal and instrumental <noise>. Her 2004 synthesis-imaging lecture derives the <system-equivalent flux density> from <antenna> collecting <area>, efficiency and system <temperature>.
The lecture then distinguishes the noise of a single baseline measurement from the sensitivity of a reconstructed image. Tracking those definitions matters when comparing observing proposals or uncertainty estimates: a signal quoted per synthesized beam is not the same quantity as a baseline's flux-density noise.<Sensitivity by Joan Wrobel>[Slides 3–12 and 19–20: antenna performance, baseline sensitivity and synthesis-image sensitivity]{ref}
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