My cold water pressure is good but hot is slow after I had a pipe replaced. How do I fix this?? ty?
They have sensors on buoys that give feed back to the satellites.Haven't heard of any deep water sensors,just surface. Here's a link about the new systems out.(UAH) is reassessing bad data from the old satellites due to orbital decay.They are not for sure if this can even be done.
This is a technique called remote sensing. The instruments used in space are calibrated in laboratories before they are sent (like any other sensor) and using algorithms with respect to field measurements. surface temperature of the ocean See SST (Sea surface temperature).
Satellites do not measure temperature as such. They measure radiances in various wavelength bands, which must then be mathematically inverted to obtain indirect inferences of temperature. The resulting temperature profiles depend on details of the methods that are used to obtain temperatures from radiances. As a result, different groups that have analyzed the satellite data to calculate temperature trends have obtained a range of values. Among these groups are Remote Sensing Systems (RSS) and the University of Alabama in Huntsville (UAH). Edit: The results from satellites do need to tinkered with (or corrected). Orbital decay needs to be accounted for. And because each layer of the atmosphere is at a different temperature, the results have to be adjusted to make sure that the layer that you want to be measures actually is the one being measured. These results are most useful when used with observations from the ground: global warming, rapid polar ice loss, increasing sea level rises, worldwide melting glaciers…
check the batteries in the thing.
How can the surface temperature be measured? The earth emits blackbody radiation characteristic of temperature. See the Planck distribution. Some frequencies are absorbed by the atmosphere (mainly by H2O and CO2) while other frequencies pass through the atmosphere with little absorption. A key point that is often missed is that the energy absorbed by atmospheric gasses is re-emitted at virtually the same frequencies that were absorbed. The ratio of intensity for two atmospheric window bands is sufficient to determine the temperature. How can the temperature of the atmosphere be measured? When a molecule absorbs radiation, it does so at a set of discrete frequencies described by vibrational and rotational quantum numbers. Only some transitions are allowed by the symmerty of the molecule. The intensity is determined by the transition dipole moment, the density of states, and the temperature. The quantum numbers are determined by frequency and the density of states can be calculated directly from the quantum number. For low quantum numbers (harmonic approximation) the dipole moment is constant and the temperature can be determined directly by comparing two or more rotational absorption bands of known quantum number. The calculation is possible, but more complex in the anharmonic region (which does not apply in this case because the upper states are not populated at atmospheric temperatures.) You can learn more by looking up P,Q and R branches of rotational spectra. I have used this method in some low temperature experiments as a check on thermocouple readings in the 4.2 K (liquid helium) - 20 K range because thermocouples are not very sensitive in this range.
