| Description: The mission_phase_name attribute provides the mission-defined name of a time period within the mission. |
| Namespace Id: mgn | Steward: geo | Class Name: Magellan_Parameters | Type: ASCII_Short_String_Collapsed |
| Minimum Value: None | Maximum Value: None | Minimum Characters: 1 | Maximum Characters: 255 |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: SHORT_STRING |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | Value | Value Meaning |
| | Aerobraking | The aerobraking phase extended from completion of the fourth mapping cycle through achievement of a near-circular orbit. Circularization was achieved more quickly than expected; the first gravity data collection in the circular orbit was not scheduled until 11 days later. Orbits included within the aerobraking phase were 7627 through 8392. Started 1993-05-26 and ended on 1993-08-05. |
| | Mapping Cycle 1 | The first mapping cycle extended from completion of the orbit trim and checkout phase until completion of one cycle of radar mapping (approximately 243 days). Started 1990-09-15 and ended 1991-05-15. |
| | Mapping Cycle 2 | The second mapping cycle extended from completion of the first mapping cycle through an additional cycle of mapping. Acquisition of 'right-looking' SAR data was emphasized. Radio occultation measurements were carried out on orbits 3212-3214. A period of battery reconditioning followed completion of Cycle 2. Started 1991-05-16 and ended 1992-01-17. |
| | Mapping Cycle 3 | The third mapping cycle extended from completion of battery reconditioning through an additional cycle of mapping (approximately 243 days). Acquisition of 'stereo' SAR data was emphasized. The last orbit in the third cycle was orbit 5747. Started 1992-01-24 and ended 1992-09-14. |
| | Mapping Cycle 4 | The fourth mapping cycle extended from completion of the third mapping cycle through an additional cycle of mapping. Acquisition of radio tracking data for gravity studies was emphasized. Radio occultation measurements were carried out on orbits 6369, 6370, 6471, and 6472. Because of poor observing geometry for gravity data collection at the beginning of the cycle, this cycle was extended 10 days beyond the nominal 243 days. Orbits included within the fourth cycle were 5748 through 7626. Periapsis was lowered on orbit 5752 to improve sensitivity to gravity features in Cycle 4. Started 1992-09-14 and ended 1993-05-25. |
| | Mapping Cycle 5 | The fifth mapping cycle extended from completion of the aerobraking phase through an additional cycle of mapping (approximately 243 days). Acquisition of radio tracking data for gravity studies was emphasized. The first orbit in the fifth cycle was orbit 8393. Started on 1993-08-16 and ended on 1994-04-15. |
| | Mapping Cycle 6 | The sixth mapping cycle extended from completion of the fifth mapping cycle through an additional cycle of mapping (approximately 243 days). Acquisition of radio tracking data for gravity studies was emphasized. The first orbit in the sixth cycle was orbit 12249. Started on 1994-04-16. |
| | Primary Mission | The prime science phase of the mission. This value occurs in the original PDS labels of the MIDR products. |