ACE Weekly 04/15/2015 - 04/21/2015 ACE spacecraft subsystems are performing as expected. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Orbit/Attitude: Type Attitude Date 04/21/2015 DOY 111 2015 Thrusters 2R 4R+ 4R- Duration 10:49 minutes Start 15:50:32z Stop 16:01:21z ra,decStart 38.56,11.74 ra,decStop 37.74,21.83 ra,decExpect 37.97,22.04 Deviation 0.30 deg (-1.9%) HGAStart -1.49 deg HGAStop +8.78 deg SunStart 9.58 deg SunStop 13.14 deg SpinStart 5.0151 rpm SpinStop 5.0181 rpm Nutation 0.14 deg Firing 55 pulses FuelUsed 0.1696 lbm FuelRemain 98.8808 lbm FinalSCMass 1333.141 lbm ACE will cross the ecliptic plane on 4/29/2015. This maneuver and the previous maneuver are longer than usual as the spacecraft attitude changes from pointing below the ecliptic plane to pointing above the ecliptic plane. The next maneuver is scheduled for Tuesday 4/28/2015. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D OCRs: None =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Activities: Data Capture: 100% DOY 102-109 2015 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Anomalies: DOY 106 04/16/2015 S-ACE-0699 G15-0008 DSS-24 Power & SSR Stuck DSS-24 lost power while transitioning to commercial power 67 minutes before End Of Track (DR# G116165). Downlink was restored with 7 minutes before End Of Track, but insufficient time for final commanding. The onboard recorder was still in playback when the spacecraft transitioned to low-rate. IMPACT: NOAA SWPC did not receive data for 60 minutes because their other antennas are unable to track ACE at the high data-rate. The onboard recorder was automatically restored by the ground procedures but manual intervention was necessary to calculate redumps. DOY 112 04/22/2015 S-ACE-0700 G15-0009 DSS-54 Configuration Issue DSS-54 configured their equipment to receive the high data-rate before the commanding was completed. The MMOC ground system repeated the first command in the sequence since no telemetry was available to indicate that the command had reached the spacecraft. (DR# M108725). IMPACT: Activities delayed 19 minutes until DSS-54 reconfigured to receive the low data-rate. Once low-rate telemetry was received by the MMOC ground system, the remaining commands were sent. The spacecraft transitioned to the high data-rate and DSS-54 configured correctly to receive the high data-rate. --_000_D15FC0FA161860HumbertoMCalvaninasagov_ Content-Type: text/html; charset="us-ascii" Content-ID: <97B837F3B7EC434F81247220BB26589C@mail.nasa.gov> Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"= > </head> <body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin= e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami= ly: Calibri, sans-serif; "> <div><span style=3D"font-family: Consolas; font-size: medium; ">ACE Weekly = 04/15/2015 - 04/21/2015</span></div> <div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">ACE spacecraft su= bsystems are performing as expected.</div> <div style=3D"font-family: Consolas; font-size: medium; "></div> <div style=3D"font-family: Consolas; font-size: medium; ">=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div> <div style=3D"font-family: Consolas; font-size: medium; ">Orbit/Attitude:</= div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Type &nb= sp; Attitude</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Date = 04/21/2015</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>DOY &nbs= p; 111 2015</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Thrusters &nbs= p; 2R 4R+ 4R-</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Duration &n= bsp; 10:49 minutes</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Start &n= bsp; 15:50:32z</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Stop &nb= sp; 16:01:21z</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>ra,decStart &n= bsp; 38.56,11.74</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>ra,decStop &nb= sp; 37.74,21.83</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>ra,decExpect = 37.97,22.04</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Deviation &nbs= p; 0.30 deg (-1.9%)</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>HGAStart  = ; -1.49 deg</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>HGAStop = +8.78 deg</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>SunStart  = ; 9.58 deg</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>SunStop = 13.14 deg</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>SpinStart &= nbsp; 5.0151 rpm</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>SpinStop &n= bsp; 5.0181 rpm</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Nutation  = ; 0.14 deg</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>Firing &= nbsp; 55 pulses</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>FuelUsed  = ; 0.1696 lbm</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>FuelRemain &nb= sp; 98.8808 lbm</div> <div style=3D"font-family: Consolas; font-size: medium; "><span class=3D"Ap= ple-tab-span" style=3D"white-space: pre; "></span>FinalSCMass 1= 333.141 lbm</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">ACE will cross th= e ecliptic plane on 4/29/2015. This maneuver and the</div> <div style=3D"font-family: Consolas; font-size: medium; ">previous maneuver= are longer than usual as the spacecraft attitude</div> <div style=3D"font-family: Consolas; font-size: medium; ">changes from poin= ting below the ecliptic plane to pointing above the</div> <div style=3D"font-family: Consolas; font-size: medium; ">ecliptic plane.</= div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">The next maneuver= is scheduled for Tuesday 4/28/2015.</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div> <div style=3D"font-family: Consolas; font-size: medium; ">OCRs:</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">None</div> <div style=3D"font-family: Consolas; font-size: medium; "></div> <div style=3D"font-family: Consolas; font-size: medium; ">=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div> <div style=3D"font-family: Consolas; font-size: medium; ">Activities:</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">Data Capture:&nbs= p; 100% DOY 102-109 2015</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div> <div style=3D"font-family: Consolas; font-size: medium; ">Anomalies:</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">DOY 106 &nbs= p;04/16/2015 S-ACE-0699 G15-0008 DSS-24 Po= wer & SSR Stuck</div> <div style=3D"font-family: Consolas; font-size: medium; ">DSS-24 lost power= while transitioning to commercial power 67 minutes</div> <div style=3D"font-family: Consolas; font-size: medium; ">before End Of Tra= ck (DR# G116165). Downlink was restored with 7 minutes</div> <div style=3D"font-family: Consolas; font-size: medium; ">before End Of Tra= ck, but insufficient time for final commanding. The</div> <div style=3D"font-family: Consolas; font-size: medium; ">onboard recorder = was still in playback when the spacecraft transitioned</div> <div style=3D"font-family: Consolas; font-size: medium; ">to low-rate.</div= > <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">IMPACT: &nbs= p;NOAA SWPC did not receive data for 60 minutes because their</div> <div style=3D"font-family: Consolas; font-size: medium; ">other antennas ar= e unable to track ACE at the high data-rate. The</div> <div style=3D"font-family: Consolas; font-size: medium; ">onboard recorder = was automatically restored by the ground procedures but</div> <div style=3D"font-family: Consolas; font-size: medium; ">manual interventi= on was necessary to calculate redumps.</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">DOY 112 &nbs= p;04/22/2015 S-ACE-0700 G15-0009 DSS-54 Co= nfiguration Issue</div> <div style=3D"font-family: Consolas; font-size: medium; ">DSS-54 configured= their equipment to receive the high data-rate before</div> <div style=3D"font-family: Consolas; font-size: medium; ">the commanding wa= s completed. The MMOC ground system repeated the first</div> <div style=3D"font-family: Consolas; font-size: medium; ">command in the se= quence since no telemetry was available to indicate</div> <div style=3D"font-family: Consolas; font-size: medium; ">that the command = had reached the spacecraft. (DR# M108725).</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> <div style=3D"font-family: Consolas; font-size: medium; ">IMPACT: &nbs= p;Activities delayed 19 minutes until DSS-54 reconfigured to</div> <div style=3D"font-family: Consolas; font-size: medium; ">receive the low d= ata-rate. Once low-rate telemetry was received by the</div> <div style=3D"font-family: Consolas; font-size: medium; ">MMOC ground syste= m, the remaining commands were sent. The spacecraft</div> <div style=3D"font-family: Consolas; font-size: medium; ">transitioned to t= he high data-rate and DSS-54 configured correctly to</div> <div style=3D"font-family: Consolas; font-size: medium; ">receive the high = data-rate.</div> <div style=3D"font-family: Consolas; font-size: medium; "><br> </div> </div> </body> </html> --_000_D15FC0FA161860HumbertoMCalvaninasagov_--