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| SOHO Status Report - January 2009 |
Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. All SOHO instruments are nominal and science operations are progressing smoothly. |
| Date: 02 Feb 2009 |
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| SOHO Status Report - November 2007 |
| Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. |
| Date: 08 Nov 2007 |
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| SOHO Status Report - May 2007 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position.
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| Date: 22 May 2007 |
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| SOHO Status Report - November 2006 |
| Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. Nominal spacecraft manoeuvres (station keeping and momentum management) were performed on 6 June and 6 September. |
| Date: 10 Nov 2006 |
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| SOHO Status Report - May 2006 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. On 7 March a nominal manoeuvre (station keeping and momentum management) was performed and 0.0146 kg of fuel was used. The remaining hydrazine is 118 kg. The solar array degradation after 123 months of flight is 18.25%, which corresponds to 1.78% per year. |
| Date: 22 May 2006 |
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| SOHO Status Report - February 2006 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. 2005 was the first year since 1996 without an Emergency Sun Reacquisition (ESR). On 15 December a nominal manoeuvre (station keeping, momentum management and roll) was performed and 0.0723 kg of fuel was used. The remaining hydrazine is 118 kg. The solar array degradation after 120 months of flight is 18.04%. The SOHO presentation to the NASA Sun-Solar System Connections Senior Review took place on 14 November. |
| Date: 15 Feb 2006 |
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| SOHO Status Report - November 2005 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. On 8 September a nominal manoeuvre (station keeping, momentum management and roll) was performed.
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| Date: 18 Nov 2005 |
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| SOHO Status Report - April 2005 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. On 22 March a nominal manoeuvre (station keeping, momentum management and roll) was performed and 0.1003 kg of fuel was used. The remaining hydrazine is 118 kg. The solar array degradation after 112 months of flight is 17.5%, which corresponds to 1.85% per year. |
| Date: 09 May 2005 |
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| SOHO Status Report - February 2005 |
| Mission Status The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. On 8 December 2004 the spacecraft transitioned into Emergency Sun Re-acquisition mode (ESR-24). The reason was a false trigger of the Coarse Sun Pointing Attitude Anomaly Detector (CSPAAD), most likely caused by a particle crossing the CSPAAD field-of-view. The particle probably came from the Fine Sun Pointing Attitude Anomaly Detector (FSPAAD), which was obstructed since April 2004 (cause of three ESRs) and is now clear. |
| Date: 10 Mar 2005 |
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| SOHO Status Report - November 2004 |
| Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. |
| Date: 29 Nov 2004 |
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| SOHO Status Report - May 2004 |
| Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position. |
| Date: 24 May 2004 |
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| SOHO Status Report - February 2004 |
Mission Status
The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed position.
With the HGA Z-axis parked, SOHO continues to experience "keyhole" periods every three months. Manoeuvres (including a 180° roll) are now executed during keyholes. With station keeping manoeuvres every three months, the burns are very small. The last two manoeuvres were held on 7 October (¿V of 0.14 ms-1) and 30 December (¿V of 0.075 ms-1). |
| Date: 03 Feb 2004 |
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| SOHO Status Report - October 2003 |
| The spacecraft status is nominal, with the High Gain Antenna (HGA) Z-axis in a fixed
position. |
| Date: 13 Oct 2003 |
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| SOHO Status Report - April 2003 |
| The spacecraft status is nominal.
On 25 February 2003 a regular station keeping and momentum management manoeuvre was
performed. The amount of fuel used was 0.54 kg which leaves about 120 kg. Due to changed
thermal settings, the thrusting was slightly unbalanced. This will be corrected in the next
manoeuver, which is planned for mid June 2003. In the absence of any proton events in the
reporting period, the solar array degradation continues to be benign. |
| Date: 18 Apr 2003 |
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| SOHO Status Report - February 2003 |
| The spacecraft status is nominal.
On 10 October 2002 a regular station keeping and momentum management manoeuvre was
performed. Fuel used: 0.22 kg. Remaining fuel: 120 kg. The next manoeuvre is planned for 19
February 2003. To improve the monitoring of the propulsion branch pressures, both sides A
and B are now powered ON. In absence of any proton events in the reporting period, the solar
array degradation was minimal. |
| Date: 06 Feb 2003 |
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