Power display correct in spot database

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K4DET
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Joined: 2008/04/23 - 13:47
Power display correct in spot database

I'm very new to wspr (as in heard about it this morning, will download it this evening), so I apologize if this is off-base.

I noticed that the following spot entry claims that .001W (1mW) is -2dBm. Shouldn't that be 0dBm? Taking a second look, the powers expressed in Watts and dBm for 1mW range from -3dBm to +1dBm. Which is authoritative, and which is derived? Perhaps a little more precision would help, or scientific notation. Thanks!

2008-04-23 22:40 MQ2JLE 10.140111 -28 1 RC89 -2 0.001 ZL2CMC RF72 2562 1592