Discover and read the best of Twitter Threads about #muos1

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#MUOS1 has hit the brakes and parked itself along with #MUOS2 at 100W. I caught the goings on on S-band in 'dramatic' fashion (yes, I need to get out more). @Spacetrack TLE with epoch 19339.64053356 shows near sync MM. ImageImageImage
@Spacetrack I believe what we are seeing in these plots is prior to the frequency discontinuity the manoeuvre. The step change is a change in mode of the s/c to storage mode evidenced by the sinusoidal carrier. Here's a plot of the carrier since the anomaly. Image
@Spacetrack If the clouds would part, my bet is #MUOS1 is flashing optically at the present time as it rotates in storage mode.
Read 3 tweets
#MUOS1 is on the move as noted by @astrobrock. I aimed the S-band dish low to my western horizon and noted her in 'storage mode' as can be seen by the 600 second period of its carrier. During MUOS5's trip to GEO we correlated this to optical characteristics of s/c rotation rate. ImageImage
#MUOS are based on the Boeing A2100 satellite bus. We have seen others of this type perform similarly. SDS-3, GOES etc. We first got a good look during the near miss with #MUOS5. MUOS5 is effectively stranded at ~106W. spaceflight101.com/spacecraft/muo…
Here's a plot of the locations of what I believe are active MUOS and UFO satellites. The #MUOS system seems to be leaving the slot out over the central pacific to the UFOs. I wonder where #MUOS3 is going? Image
Read 5 tweets

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