Basic n00b question

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Joined: 2016/02/11 - 08:00
Basic n00b question

Hi, old ham but brand new to WSPR. I find it very interesting. My very basic question is this: How do you get usable data when everyone's antenna is different? In my mind everyone would want to use some standardized antenna and power. How do you get good propagation data with such variation in antenna efficiency both on transmit and receive? I'm obviously missing something (or a lot)! Thanks in advance for trying to set me straight!