The phrase "a layer of observation" is correct and usable in written English.
It can be used in contexts where you want to describe a level or aspect of observation, often in analytical or scientific discussions.
Example: "In our study, we applied a layer of observation to better understand the behavioral patterns of the subjects."
Alternatives: "a level of observation" or "a dimension of observation".
Longitudinal and transverse cross-sections were cut from different part of scaffold sheet, mounted on stubs and sputter coated with a layer of platinum for observation at 10 keV at various levels of magnification.
Tiselius originated the moving-boundary method of observation, in which a layer of pure (i.e., without particles) fluid is placed over a quantity of the same fluid containing colloidal particles; the boundary between two layers of fluid is visible and moves at the speed of electrophoresis of the particles.
(Let me add that this observation is a layer of frivolous enjoyment all its own).
He's spent his life producing some of the most extraordinary songs ever written, songs of astonishing complexity, layers upon layers, with a brevity of observation that could shame the great novelists.
Although it was suggested that long papillae, swollen during spawning, could disperse gametes across a thin layer of sand [17], our observations showed that C. subdepressus avoid contact of gametes with sand grains by clearing the apex during spawning.
Using the smoker's location, data were collected by direct observation; we created maps in ArcGIS V.10 using a 'heads up' digitisation technique, spatially locating the observed smoker's locations using an aerial orthophotograph base layer of all the observation sites in Vancouver.
According to the OODA cognitive behavioral model ("Collective behavior of robots" section), the behavior management layer is composed of observation, orientation, decision and action modules.
The representation is subject to the following assumptions: the heating is localized to the surface layer, the point of observation is outside of the volume defined by significant thermal diffusion, and the optical energy is converted to heat close to the irradiated boundary.
However, an additional layer of complexity stems from the observation that patients with the same staging often show a different clinical evolution, highlighting the heterogeneity of gastric cancer [ 6].
The surprising observation of a hidden layer of errors, absent from the mature macronucleus but present during development, also underscores the need for repair or screening of incorrectly-assembled DNA molecules.
