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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. |
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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 20,000 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. |
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TD-4.pdf
(640Kb)
The files with the "pdf" file
extension are Adobe Acrobat "portable document format"
files.
You can obtain a free viewer by following this link
|
| Main telescope |
| Diameter |
47mm |
 |
| Magnification |
18X |
| Image |
Inverted |
| Field of view |
2°30' |
| Resolution |
3.5" |
| Sub telescope |
| Diameter |
16mm |
| Magnification |
4X |
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)x240(D)x270(H)mm
5.2kg |
| Case |
465(W)x220(D)x305(H)mm
4kg |
| Tripod(metal) |
1700mm(when fully expanded)
1030mm(when fully contracted)
4kg |
| Power |
| Main power |
Lithium ion battery(rechargeable) |
| Backup memory |
Lithium battery |
| Accessories |
| Hood |
1 piece |
| Eyepiece filters |
1 piece(switch between
colors by rotating) |
| Tubular compass |
1 piece |
| Level vial adjusting pin |
1 piece |
| Earphone for buzzer |
1 piece |
| Tripod |
1 piece |
| Battery charger(100-240V) |
1 piece |
| Carrying case |
1 piece |
| Instruction manual |
1 piece |
| Optional items |
| Printer |
Thermal head, 16 digits
80(W)x120(D)x60(H)mm
500g
comes with a connection cable |
| Software for TD-4 |
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| RS-232C cable |
For PC |
| Chart paper |
10 rolls per set |
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| With the optional printer,
data can be printed out at real time. |
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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. |
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