"Brian Hoover" wrote in message ...
I notice the high and low points of the ISS altitude for the last two orbits
have been higher than the last few days worth. I take it the ISS is having a
reboost?

Brian

You may have already seen this in Jacques post, there was a phasing
burn on Thursday to support the upcoming Soyuz mission:

"At 9:11am EDT, a 6 min 50 sec reboost of the ISS was performed by
Progress
12P, designed to lift the apogee of the station's slightly elliptical
orbit
by 5.9 km to 388.8 km (perigee remaining at 375 km, i.e., mean
altitude
increase = 2.9 km). Total delta-V: 2.2 m/sec, as planned. For the
maneuver, the ISS at 6:00am maneuvered from XPOP to LVLH. After the
reboost, ISS now remains in LVLH attitude, under U.S. CMG momentum
management."

One minor note, the actual reboost delta-V was 1.67 m/s (as planned),
2.2 m/s was the target loaded to the vehicle, which is higher than the
actual value due to a nuance in the software.