TAMAYA Digital Balloon Theodolite 〈TD-4〉
TD-4 shows unprecedented cost performance with high accuracy and high resolving power (0.01° as smallest unit of display).
With its built-in memory, a data collector is no longer necessary.
TD-4 is a digital balloon theodolite which traces a pilot balloon in the air, and through elevation and azimuth data informs the user the conditions in the upper atmosphere.
With a built-in memory function, the TD-4 can store up to 100,000 measurement data.
The traditional data collector is no longer necessary, and the user can check stored data on the display of TD-4. Also, with the optional printer, the user can print out data real time.
Or, the user can connect a computer to TD-4’s RS-232C interface to analyze data from TD-4 with the computer.
Compact, lightweight(5.2kg), and with high accuracy (smallest unit of display is 0.01° for both azimuth and elevation), TD-4 is about half in weight and five times the accuracy compared to TD-3, our previous model.
With the optional printer, data can be printed out at real time.
《Specifications》
| Main Telescope | Diameter | 47mm |
|---|---|---|
| Magnification | 18× | |
| Image | Inverted | |
| Field of view | 2°30′ | |
| Resolution | 3.5″ | |
| Sub Telescope | Diameter | 16mm |
| Magnification | 4× | |
| Image | Inverted | |
| Field of view | 11° | |
| Resolution | 12″ | |
| Digital Angle Display | Azimuth | 0-360° |
| Elevation | 0-360° | |
| Smallest Unit | 0.01°(for both azimuth and elevation) | |
| Display | LCD (16 digits, 2 lines) | |
| Functions | Clock Function | Built-in real-time clock calendar function |
| Timer | 1-99 seconds | |
| Command and Alarm | Buzzing | |
| Input of Measurement Error | Push button | |
| Azimuth Set Function | Key input (dialogue) | |
| External Input/Output Function | RS-232C | |
| Operating Time | Approx. 20 hours continuous | |
| Level Vial | Sensitivity | 90″/2mm |
| Dimensions/Weight | Body | 192（W）×270（H）×240（D）mm 5.2kg |
| Case | 465（W）×305（H）×220（D）mm 4.0kg | |
| Tripod (metal) | 1700mm（when fully expanded） 1030mm（when fully contracted） 4.0kg | |
| Power | Main Power | Lithium ion battery (rechargeable) |
| Accessories | Hood | 1 piece |
| Eyepiece Filters | 1 set (switch between colors by rotating) | |
| Tubular Compass | 1 piece | |
| Level Vial Adjusting Pin | 1 piece | |
| Earphone for Buzzer | 1 piece | |
| Tripod | 1 set | |
| Battery Charger(100-240V) | 1 piece | |
| Carrying Case | 1 set | |
| Instruction Manual | 1 set | |
| Optional items | Printer | Thermal head, 16 digits 80(W)x60(H)x120(D)mm, 0.5Kg |
| Software for TD-4 | CD-ROM | |
| RS-232C Cable | For PC | |
| Chart Paper | 10 rolls per set |
TD-4’s Data-processing Software
Using TD-4’s data-processing software, the user can make graphs showing relationships between “altitude and wind direction” and “altitude and wind speed” as well as graphs showing the path of pilot balloon.
The user can make such graphs based on azimuth and elevation data, taken at certain intervals, which are stored as Excel format.
