| Month | Angstrom-Prescott Err (%) | Allen Err (%) | Sabbagh Err (%) |
| January | −1.433 | 7.941 | −10.148 |
| February | −7.705 | 2.388 | −9.643 |
| March | −13.606 | −7.328 | −9.358 |
| April | −9.865 | −10.885 | −5.277 |
| May | −5.056 | −12.162 | −7.138 |
| June | 0.458 | −10.951 | −8.829 |
| July | 7.021 | −9.677 | −10.911 |
| August | 8.853 | −11.415 | −12.83 |
| September | 6.033 | −10.906 | −12.736 |
| October | 2.911 | −4.298 | −8.870 |
| November | −0.807 | 7.331 | −5.371 |
| December | 2.547 | 12.462 | −4.941 |
| Average | −0.887 | −3.958 | −8.838 |