[en] Observations are described of the soft X-ray background in a part of the northern hemisphere in the energy range 0.06 - 3.0 keV. The X-ray instruments, placed onboard a sounding rocket, are a one-dimensional focusing collector with multi-cell proportional counters in the focal plane and eight large area counters on deployable panels. A description of the instruments and their preflight calibration is given. Precautions were taken to prevent UV sensitivity of the X-ray instruments. The observation program, which consisted of a number of pre-programmed slow scans, is outlined. The spectral date on the soft X-ray background in these and previous observations showed that at least two components of different temperature are present. A low temperature component of approximately (3-10)x10⁵ is found all over the sky. Components of higher temperature approximately 3x10⁶ K are found in regions of soft X-ray enhancement; The North Polar Spur has been observed in two scans at the galactic latitude b=25⁰ and b=75⁰. The X-ray ridge structure is found to be strongly energy dependent. The low energy data (< 0.25 keV) at b=75⁰ reveals two separate emission features on the ridge, both probably of finite extensions (approximately equal to 0⁰.5). A wider X-ray ridge (approximately equal to 10⁰) is observed above 0.4 keV. (Auth.)