The phrase "at the upper field" is correct and usable in written English.
It can be used to refer to a specific location that is situated at a higher elevation or position within a larger area, such as a sports field or agricultural land.
Example: "The players gathered at the upper field for the final match of the tournament."
Alternatives: "in the higher field" or "at the top field".
"I checked the upper field at Eastchester High, and there was a team there," Ms. Rankin said.
Beginning at the upper critical field (Hc2), it is completed at a lower critical field (Hc1; see Figure 2).
V6 is characterized by a medially located "upper" field representation distinct from the upper-field representation in lateral area V3A.
But at the upper end, the food field has become highly professional.
Stare at the upper deck in right field, where Mickey's towering homer off Cardinal reliever Barney Schultz landed in 1964.
Nodules are mostly spread at the upper and middle lung fields in a peripheral location; few are subpleuric.
Finally emotion separation in the MPFC was identified soon after it appeared in the amygdala for stimuli presented at the centre and in the upper visual field, consistent with the role of this area as a monitoring area for the early amygdala activity, i.e. capable of exerting inhibitory influence if necessary on the amygdala output.
Briefly, HRCT findings were evaluated at 3 anatomic levels in both lungs: near the superior margin of the aortic arch (level of the upper lung field), at the level of the carina (level of the middle lung field), and at the level of the orifice of the inferior pulmonary veins (level of the lower lung field).
Finally, they lift the pouched remains into a rectangular aluminum "transfer case" and drape the case with a flag, placing the starred blue field at the upper left, over the soldier's heart.
As depicted, an erosion field at the upper part of the cylindrical body of the hydrocyclone appeared and developed, when the solid concentration was increased.
