Task: Data-Imputation (source dataset: WebTable)

Please fill in the missing value in the input table. The missing value is denoted by '[MISSING]'. Please only return the value filled in. Do not return the whole table.

No explanation, return the value filled in JSON format: {"value": "filled_value"}. 

Input Table:
| System                                              | 95% Accuracy (Lateral / Vertical)   | Details                                                                                                                                                                                                                                                                                        |
|:----------------------------------------------------|:------------------------------------|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| LORAN-C Specification                               | 460 m / 460 m                       | The specified absolute accuracy of the LORAN-C system.                                                                                                                                                                                                                                         |
| Distance Measuring Equipment (DME) Specification    | 185 m (Linear)                      | DME is a radionavigation aid that can calculate the linear distance from an aircraft to ground equipment.                                                                                                                                                                                      |
| GPS Specification                                   | 100 m / 150 m                       | The specified accuracy of the GPS system with the Selective Availability (SA) option turned on. SA was employed by the U.S. Government until May 1, 2000.                                                                                                                                      |
| LORAN-C Measured Repeatability                      | 50 m / 50 m                         | The U.S. Coast Guard reports "return to position" accuracies of 50 meters in time difference mode.                                                                                                                                                                                             |
| [MISSING]                                           | nan                                 | Modern LORAN-C receivers, which use all the available signals simultaneously and H-field antennas.                                                                                                                                                                                             |
| Differential GPS (DGPS)                             | 10 m / 10 m                         | This is the Differential GPS (DGPS) worst-case accuracy. According to the 2001 Federal Radionavigation Systems (FRS) report published jointly by the U.S. DOT and Department of Defense (DoD), accuracy degrades with distance from the facility; it can be < 1 m but will normally be < 10 m. |
| Wide Area Augmentation System (WAAS) Specification  | 7.6 m / 7.6 m                       | The worst-case accuracy that the WAAS must provide to be used in precision approaches.                                                                                                                                                                                                         |
| GPS Measured                                        | 2.5 m / 4.7 m                       | The actual measured accuracy of the system (excluding receiver errors), with SA turned off, based on the findings of the FAA's National Satellite Test Bed, or NSTB.                                                                                                                           |
| WAAS Measured                                       | 0.9 m / 1.3 m                       | The actual measured accuracy of the system (excluding receiver errors), based on the NSTB's findings.                                                                                                                                                                                          |
| Local Area Augmentation System (LAAS) Specification | nan                                 | The goal of the LAAS program is to provide Category IIIC ILS capability. This will allow aircraft to land with zero visibility utilizing 'autoland' systems and will indicate a very high accuracy of < 1 m.                                                                                   |



row_idx: 4
col_idx: 0
col_name: System
label: eLORAN Repeatability