The phrase "approximately the same longitude" is correct and usable in written English.
It can be used when discussing geographical locations that are close in terms of their longitudinal coordinates.
Example: "The two cities are approximately the same longitude, making them ideal for a comparative study of their climates."
Alternatives: "roughly the same longitude" or "nearly identical longitude".
TSU, at approximately the same longitude as KMH and HER, but located further north at a latitude of 19.22°S, displays a Y-component secular variation that is approximately 6 months later than at KMH.
Assuming that bird A remained south of Inaccessible at approximately the same longitude, 35.6 and 28.3% of dives occurred within 2 h of sunrise and sunset, respectively.
The TEC data has been obtained from a southern hemispheric station, Diego Garcia (7.27° S, 72.4° E; 15.3° S MLAT), that is located approximately in the same longitude sector as that used for obtaining the EEJ strength.
The country lies at roughly the same longitude as Britain, but since 1942 has been an hour ahead.
At that time, Helene and Gordon were at roughly the same longitude in the open ocean.
The station pairs were within the same longitude.
In addition, the F3/C did not allow consecutive observation at the same longitude, and the observations from the CHAMP and GRACE satellites took long collection times (130 and 160.5 days, respectively) to cover all local times at the same longitude.
They were detected by ground based stellar occultations in the 1980s, by Voyager 2 in 1989 and by Hubble Space Telescope and ground based telescopes in 1997 2005 and remained at approximately the same orbital longitudes.
In contrast to Hartebeesthoek (25.88°S), Keetmanshoop (26.54°S) which is located at approximately the same latitude but different longitude, the Y-component secular variation diminished at a rapid rate of −20.7 nT/year2 between 2012 and 2013, while after this date it increases at a rate of 15.3 nT/year2.
These two station pairs are located approximately along the same geomagnetic longitude and latitude, respectively.
They can move in longitude, but stay at approximately the same latitude as they are unable to escape from the confining zone.
