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Table 1
Previous models based on in situ and radio science measurements (see text for detailed descriptions).
| Spacecraft | Data type | Author |
|
|
||
| Mariner 6 and 7 | radio science | Muhleman et al. (1977) |
| Voyager 2 | radio science | Anderson et al. (1987) |
| Ulysses | radio science | Bird et al. (1994) |
| Helios land 2 | in situ | Bougeret et al. (1984) |
| Ulysses | in situ | Issautier et al. (1998) |
| Skylab | Coronagraph | Guhathakurta et al. (1996) |
| Wind | solar radio | Leblanc et al. (1998) |
| burst III | ||
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