The phrase "a detailed observer" is correct and usable in written English.
You can use it to describe someone who pays close attention to details in their observations, often in contexts like research, art, or nature.
Example: "As a detailed observer of wildlife, she could identify even the slightest changes in animal behavior."
Alternatives: "a keen observer" or "a meticulous observer."
Other researchers emphasize that it is already difficult to get detailed observer data from NOAA.
4 5 We report here a detailed study of observer variation that explores the sources of disagreement when extracting data for calculation of standardised mean differences.
Arndt et al 11 performed a detailed study of observer rating scores in a multicentre field setting, while Goldberg et al 7 examined several clinical research databases, with errors ranging from 2.3% to 26.9% detected by the double-entry method in fields relating to timepoints of disease and tumour recurrence status.
With no journalists, local or foreign, able to operate inside Syria's sixth-largest city, courageous local activists have given the Observer a detailed account of life under the jihadists' totalitarian regime, a rare glimpse of everyday life in the city.
As more details about the death emerged, the Observer published a detailed profile, Grishka Rasuputin: The career of a sanctimonious adventurer, by historian Zinovy N. Preev.
Panic really began to creep in after reading several accounts, including a detailed article in The New York Observer last week, about the possibility of the subway system's being fully wired for cell-phone use.
I'd like more detail on the 'neurometric' ideal observer – We direct the reviewer's attention to the section of the Materials and methods titled 'neurometric curves' for a detailed description of the ideal observer analysis.
Besides completing the observation checklist, the observers also maintained notes and a diary; after each observation, a detailed report was prepared.
In a detailed criticism of the election, observers from the European Union said the inconsistency was the "result of a government strategy, in certain cases through the enforcement of person-specific provisions".
They were followed; shot at; harassed by police, soldiers and Desa's private security officers; and threatened with kidnap and death, according to a detailed log kept by international observers.
