# Read This First

There is a row in the table for each sonic at each site. The first column is the site, the second is the nominal height of the sonic, and the third is the type of sonic. The first three columns, the ones in bold, should not change.

If a sonic is not actually at the nominal height, you can edit the actual height field for that sonic, but initially all the actual heights are filled in with the nominal height.

To record the horizontal orientation of a sonic, measure the bearing of the boom relative to magnetic north looking along the boom towards the tower. In the measurement columns on the right, record the measured bearing, who made it, and any other relevant notes, like how it was made. For example, *99 deg, gg, handheld compass, 12/15/2016*. If there is more than one measurement for a sonic, then more than one measurement column will be filled in. Finally, derive the best approximation for the boom angle from all the measurements and enter it in the *Bearing* column. Derive the angle as an average, or just pick the most reliable measurement.

Usually all the sonic booms on a tower have the same bearing, in which case you can copy one measurement to all the heights at that site.

The sonic type should be enough to indicate how the sonic is mounted relative to the boom, as indicated in the table below. If a sonic is not mounted according to the conventions below, then the boom angle bearing in the table needs to be adjusted accordingly. For example, if a sonic is rotated 180 degrees from the conventional orientation, then add 180 degrees to the boom angle and note that in one of the the measurement columns.

Sonic Type | Mounting relative to boom |
---|---|

RMYoung | Black wiring box points towards tower in line with boom |

Metek | Arrow on side points away from boom (confirmed by Dan in comments below) |

Gill 3D | All the Gills were mounted by DTU and ARL, and we assume they were oriented to north, so the boom angles below are left Entering zero would still apply the magnetic declination adjustment, so better to leave them blank. |

CSAT3 | White box above the boom, lettering upright |

CSAT3A (EC150) | Mounting post inserts into end of boom, cable exits head beneath boom |

This table is scraped by a script to extract all the angles and generate calibration files for NIDAS processing, so the layout should not change and the meaning of the columns should not change. Other than that, edit it like you would any other wiki page.

# Sonic Angles Table

** The boom angle is the bearing of the boom pointing away from the tower relative to magnetic north, in units of degrees. If you shoot the angle looking along the boom towards the tower (ie, so the tower is not obstructing the view of the boom), then add 180 degrees to get the boom angle expected in this table. **Initially we just need rough estimates in this table.

rne01 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |
---|---|---|---|---|---|---|---|

rne01 | 10m | CSAT3 | 10 | ||||

rne02 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne02 | 10m | RMY81000 | 10 | ||||

rne02 | 20m | RMY81000 | 20 | ||||

rne03 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne03 | 10m | CSAT3A | 10 | ||||

rne04 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne04 | 10m | RMY81000 | 10 | ||||

rne05 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne05 | 10m | RMY81000 | 10 | ||||

rne05 | 20m | RMY81000 | 20 | ||||

rne06 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne06 | 10m | CSAT3 | 10 | ||||

rne06 | 20m | CSAT3A | 20 | ||||

rne07 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rne07 | 10m | CSAT3A | 10 | ||||

rne07 | 20m | CSAT3 | 20 | ||||

rsw01 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw01 | 10m | METEK | 10 | ||||

rsw01 | 20m | METEK | 20 | ||||

rsw02 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw02 | 10m | RMY81000 | 10 | ||||

rsw02 | 20m | RMY81000 | 20 | ||||

rsw03 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw03 | 10m | Gill3D | 10 | ||||

rsw03 | 20m | Gill3D | 20 | ||||

rsw03 | 30m | Gill3D | 30 | ||||

rsw03 | 40m | Gill3D | 40 | ||||

rsw03 | 60m | Gill3D | 60 | ||||

rsw04 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw04 | 10m | CSAT3A | 10 | ||||

rsw05 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw05 | 10m | METEK | 10 | ||||

rsw06 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw06 | 10m | Gill3D | 10 | ||||

rsw06 | 20m | Gill3D | 20 | ||||

rsw06 | 30m | Gill3D | 30 | ||||

rsw06 | 40m | Gill3D | 40 | ||||

rsw06 | 60m | Gill3D | 60 | ||||

rsw07 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw07 | 10m | CSAT3 | 10 | ||||

rsw07 | 20m | CSAT3A | 20 | ||||

rsw08 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

rsw08 | 10m | METEK | 10 | ||||

rsw08 | 20m | METEK | 20 | ||||

tnw01 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw01 | 2m | RMY81000 | 2 | ||||

tnw01 | 10m | RMY81000 | 10 | ||||

tnw01 | 20m | RMY81000 | 20 | ||||

tnw02 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw02 | 2m | RMY81000 | 2 | ||||

tnw02 | 10m | CSAT3A | 10 | ||||

tnw02 | 20m | CSAT3 | 20 | ||||

tnw03 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw03 | 2m | METEK | 2 | ||||

tnw03 | 10m | METEK | 10 | ||||

tnw04 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw04 | 2m | RMY81000 | 2 | ||||

tnw04 | 4m | RMY81000 | 4 | ||||

tnw04 | 6m | RMY81000 | 6 | ||||

tnw04 | 8m | RMY81000 | 8 | ||||

tnw04 | 10m | RMY81000 | 10 | ||||

tnw04 | 12m | RMY81000 | 12 | ||||

tnw04 | 20m | RMY81000 | 20 | ||||

tnw05 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw05 | 2m | RMY81000 | 2 | ||||

tnw05 | 4m | RMY81000 | 4 | ||||

tnw05 | 6m | RMY81000 | 6 | ||||

tnw05 | 8m | RMY81000 | 8 | ||||

tnw05 | 10m | CSAT3A | 10 | ||||

tnw05 | 12m | RMY81000 | 12 | ||||

tnw05 | 20m | CSAT3 | 20 | ||||

tnw06 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw06 | 2m | RMY81000 | 2 | ||||

tnw06 | 4m | RMY81000 | 4 | ||||

tnw06 | 6m | RMY81000 | 6 | ||||

tnw06 | 8m | RMY81000 | 8 | ||||

tnw06 | 10m | RMY81000 | 10 | ||||

tnw06 | 12m | RMY81000 | 12 | ||||

tnw06 | 20m | RMY81000 | 20 | ||||

tnw07 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw07 | 4m | RMY81000 | 4 | ||||

tnw07 | 6m | RMY81000 | 6 | ||||

tnw07 | 8m | RMY81000 | 8 | ||||

tnw07 | 10m | Gill3D | 10 | ||||

tnw07 | 12m | RMY81000 | 12 | ||||

tnw07 | 20m | Gill3D | 20 | ||||

tnw07 | 30m | Gill3D | 30 | ||||

tnw07 | 40m | Gill3D | 40 | ||||

tnw07 | 60m | Gill3D | 60 | ||||

tnw08 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw08 | 2m | RMY81000 | 2 | ||||

tnw08 | 10m | RMY81000 | 10 | ||||

tnw08 | 20m | RMY81000 | 20 | ||||

tnw09 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw09 | 2m | RMY81000 | 2 | ||||

tnw09 | 10m | CSAT3 | 10 | ||||

tnw10 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw10 | 10m | Gill3D | 10 | ||||

tnw10 | 20m | Gill3D | 20 | ||||

tnw10 | 30m | Gill3D | 30 | ||||

tnw10 | 40m | Gill3D | 40 | ||||

tnw10 | 60m | Gill3D | 60 | ||||

tnw11 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tnw11 | 2m | RMY81000 | 2 | ||||

tnw11 | 10m | RMY81000 | 10 | ||||

tnw11 | 20m | RMY81000 | 20 | ||||

tse01 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse01 | 10m | CSAT3A | 10 | ||||

tse01 | 30m | CSAT3 | 30 | ||||

tse02 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse02 | 10m | CSAT3A | 10 | ||||

tse02 | 30m | CSAT3 | 30 | ||||

tse04 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse04 | 10m | Gill3D | 10 | ||||

tse04 | 20m | Gill3D | 20 | ||||

tse04 | 30m | Gill3D | 30 | ||||

tse04 | 40m | Gill3D | 40 | ||||

tse04 | 60m | Gill3D | 60 | ||||

tse04 | 80m | Gill3D | 80 | ||||

tse04 | 80m | Gill3D | 80 | ||||

tse04 | 100m | Gill3D | 100 | ||||

tse05 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse05 | 10m | CSAT3A | 10 | ||||

tse05 | 20m | CSAT3 | 20 | ||||

tse06 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse06 | 10m | Gill3D | 10 | ||||

tse06 | 20m | Gill3D | 20 | ||||

tse06 | 30m | Gill3D | 30 | ||||

tse06 | 40m | Gill3D | 40 | ||||

tse06 | 60m | Gill3D | 60 | ||||

tse07 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse07 | 10m | CSAT3 | 10 | ||||

tse07 | 20m | CSAT3 | 20 | ||||

tse08 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse08 | 10m | METEK | 10 | ||||

tse08 | 20m | METEK | 20 | ||||

tse09 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse09 | 10m | Gill3D | 10 | ||||

tse09 | 20m | Gill3D | 20 | ||||

tse09 | 30m | Gill3D | 30 | ||||

tse09 | 40m | Gill3D | 40 | ||||

tse09 | 60m | Gill3D | 60 | ||||

tse09 | 80m | Gill3D | 80 | ||||

tse09 | 100m | Gill3D | 100 | ||||

tse10 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse10 | 10m | METEK | 10 | ||||

tse10 | 30m | METEK | 30 | ||||

tse11 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse11 | 10m | Gill3D | 10 | ||||

tse11 | 20m | Gill3D | 20 | ||||

tse11 | 30m | Gill3D | 30 | ||||

tse11 | 40m | Gill3D | 40 | ||||

tse11 | 60m | Gill3D | 60 | ||||

tse12 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse12 | 10m | CSAT3 | 10 | ||||

tse12 | 20m | CSAT3 | 20 | ||||

tse13 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse13 | 10m | Gill3D | 10 | ||||

tse13 | 20m | Gill3D | 20 | ||||

tse13 | 30m | Gill3D | 30 | ||||

tse13 | 40m | Gill3D | 40 | ||||

tse13 | 60m | Gill3D | 60 | ||||

tse13 | 80m | Gill3D | 80 | ||||

tse13 | 100m | Gill3D | 100 | ||||

tse14 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse14 | 10m | CSAT3 | 10 | ||||

tse14 | 20m | CSAT3 | 20 | ||||

tse15 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

tse15 | 10m | METEK | 10 | ||||

tse15 | 20m | METEK | 20 | ||||

v01 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v01 | 2m | CSAT3 | 2 | ||||

v01 | 10m | CSAT3 | 10 | ||||

v02 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v02 | 2m | METEK | 2 | ||||

v02 | 10m | METEK | 10 | ||||

v02 | 20m | METEK | 20 | ||||

v03 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v03 | 2m | CSAT3A | 2 | ||||

v03 | 10m | CSAT3 | 10 | ||||

v04 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v04 | 2m | CSAT3 | 2 | ||||

v04 | 10m | CSAT3A | 10 | ||||

v05 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v05 | 2m | METEK | 2 | ||||

v05 | 10m | METEK | 10 | ||||

v05 | 20m | METEK | 20 | ||||

v06 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v06 | 2m | CSAT3 | 2 | ||||

v06 | 10m | CSAT3 | 10 | ||||

v06 | 20m | CSAT3A | 20 | ||||

v07 | Height | Sonic | Actual (m) | Boom angle (degrees) | Measurement One | Measurement Two | Measurement Three |

v07 | 2m | CSAT3 | 2 | ||||

v07 | 4m | RMY81000 | 4 | ||||

v07 | 6m | RMY81000 | 6 | ||||

v07 | 8m | RMY81000 | 8 | ||||

v07 | 10m | CSAT3 | 10 | ||||

v07 | 12m | RMY81000 | 12 | ||||

v07 | 20m | CSAT3A | 20 |

## 4 Comments

## Steve Oncley

You could enter the rough estimates that I did, documented in my 13 Apr blog, with values entered in cal_files/noQC for all sonics (except Gills, that seem to have been oriented to north by INEGI and DTU during installation).

## Steve Oncley

Also, the "official" boom angles for this project are supposed to be derived from the complete set of laser theodolite measurements, which we are supposed to work on during operations, and which will include our "multistation", along with 2 others from DTU. I assume that Per and/or Robert will coordinate this. Thus, I don't think we need to kill ourselves with compass shoots, though at least one attempt would be great.

## Daniel Buonome

Confirmed for the Metek, the north arrow pointed away from the tower parallel to the boom

## Steve Oncley

Thought I'd include an email exchange I had with Robert Menke about the multistation scan results:

me: As I understand it, for each sonic, you scanned 2 points on the boom, roughly horizontal (p1, p2) and two points on what I'll call the riser of the sonic head, roughly vertical (p3, p4). From the projection of p1-p2 on the x-y plane, you get azimuth. From the projection of p1-p2 on the x-z plane (with x aligned with the boom), you would get what I call the pitch angle. From the projection of p3-p4 on the y-z plane, you should get what I would call the roll angle and from the projection of p3-p4 on the x-z plane, you should get a redundant measure of pitch (assuming that Samortecnica's welding of the boom riser was perfectly a right angle).

Robert: We investigated roll and redundant pitch, but realised that the uncertainties on p3 and p4 are too high to derive meaning full results from it. Due to the geometry of the sonics we had to place the measurement points close to each other, for the Gill sonics they are both on the lower part of the riser about 300mm apart. We ended up to only use the mean value of p3 and p4 to determine the global position of the sonic in the x-y plane (neglecting the displacement from the center position by the radius of the lower raiser).