---
platform: HALO
flight_id: HALO-20240813a
nickname: Tri-location
takeoff: "2024-08-13 14:15:39Z"
landing: "2024-08-13 22:59:33Z"
departure_airport: GVAC
arrival_airport: GVAC
crew:
  - name: Forian Ewald
    job: PI
  - name: Tanja Bodenbach
    job: WALES
  - name: Georgios Dekoutsidis
    job: HAMP
  - name: Theresa Mieslinger
    job: Dropsondes
  - name: Sophie Rosenburg
    job: Smart, VELOX, BACARDI
  - name: Lea Volkmer
    job: SpecMACS
  - name: Bjorn Stevens
    job: Scientist
  - name: Martin Singh
    job: Ground contact
instruments:
  BACARDI:
    comment: no entry
    operational: true
  BAHAMAS:
    comment: no entry
    operational: true
  Dropsondes:
    comment: 50 sondes in total, 1 on the EC track and 49 sondes distributed over 4 circles with 1 launch detect failure in `c_north`
    operational: true
  HAMP:
    comment: no entry
    operational: true
  PI-Camera: 
    comment: MM-DD:hh:mm:ss reset based on Bjorn's watch (within 1s of Bahamas time) betwen DSC_6548 and DSC_6549, year inadvertently set to 2019 
    operational: true
  Smart:
    comment: Upper sensor was fixed and the downward irradiance Fdw has to be corrected. For quicklooks the offset angles have been approximated so Fdw has to be regarded as preliminary.
    operational: true
  SpecMACS:
    comment: Nadir measurements started about 20 min after takeoff due to temperature issues. Some ice on one of the side cameras just before it got dark. Measurements stopped at 20:30 UTC due to darkness.
    operational: true
  VELOX:
    comment: VELOX fully functional; KT-19 affected by condensation
    operational: true
  WALES:
    comment: no entry
    operational: true
categories: [ec_north, ec_under, ec_track, c_north, c_mid, c_south, c_atr, ec_south]
orphan: true
---

{logo}`PERCUSION`

# {front}`flight_id`

```{badges}
```

## Crew

```{crew-list}
```

## Track
![track](../figures/HALO-20240813a/HALO-20240813a-track.jpeg)

## Conditions

```{track-animation}
:flight_id: HALO-20240813a
```

Describe the meteorology

## Execution

Describe the flight execution

### EarthCare Underpass

*HALO-20240813a underpass distance 31 m at 2024-08-13T15:39:53.0 s*

## Impressions

(itemized list of things you saw)
* north of the ITCZ edge shallow clouds were overlayed by a heavy dust layer. Cirrus clouds aloft.
* about 138 nm from SAL there was an abrupt drop of about 5mm in the PW
* EC meeting point at 15:41:30 UTC on slightly lower FL360
* passing by the northern circle on the EC track there are very calm surface winds obvious from a narrow sun glint spot in specMACS and high radar reflectivity from the surface at around 15:55 UTC

```{note}
Co-location with ATR and EarthCARE over an aerosol layer near SAL. Spectacular line of convection on southern edge toward the west.
```

````{card-carousel} 2
```{card}
:img-top: ../figures/HALO-20240813a/0813a-crew.jpeg
Scientific Crew
```

```{card}
:img-top: ../figures/HALO-20240813a/170153.jpeg

Developing cell with blow-off (17:01:53 UTC)
```

```{card}
:img-top: ../figures/HALO-20240813a/170306.jpeg

Close up of leading cell on line (17:03:06 UTC)
```

```{card}
:img-top: ../figures/HALO-20240813a/182907.jpeg

Line from south (18:29:07 UTC)
```

```{card}
:img-top: ../figures/HALO-20240813a/190716.jpeg

Cloud bow on return (19:07:16 UTC)
```
```{card}
:img-top: ../figures/HALO-20240813a/200616.jpeg

Sun setting in dirt (20:06:16 UTC)
```
````

## Instrument status & quicklooks

```{instrument-table}
```
````{card-carousel} 2

```{card}
:img-top: ../figures/HALO-20240813a/HALO_20240813a_BACARDI_QL.png
BACARDI
```

```{card}
:img-top: ../figures/HALO-20240813a/20240813_circle_profiles.jpeg

Dropsondes
```

```{card}
:img-top: ../figures/HALO-20240813a/hamp_fullflight_HALO-20240813a.png
HAMP 
```

```{card}
:img-top: ../figures/HALO-20240813a/hamp_ec_under_HALO-20240813a.png
HAMP EarthCARE underpass
```

```{card}
:img-top: ../figures/HALO-20240813a/hamp_radar_ec_under_HALO-20240813a.png
Radar during EarthCARE underpass
```

```{card}
:img-top: ../figures/HALO-20240813a/HALO_20240813a_KT19_QL.png
KT19 Timeseries of brigthness temperature.
```

```{card}
:img-top: ../figures/HALO-20240813a/HALO_20240813a_SMART_QL.png
SMART Time series of upward and downward spectral irradiadiance, and albedo.
```

```{card}
[![specMACS RGB snapshots](../figures/HALO-20240813a/quicklook_20240813_polb_small.png)](https://www.meteorologie.lmu.de/~quicklooks/specMACS/PERCUSION/quicklooks/polcams/quicklook_20240813_polb.png)
specMACS RGB snapshots from polb (lower right) with EarthCARE underpass marked in red. Find further quicklooks [here](https://www.meteorologie.lmu.de/~quicklooks/specMACS/PERCUSION/flight_HALO-0813.html).
```

```{card}
:img-top: ../figures/HALO-20240813a/QL_VELOX_HALO_20240813a.jpg
VELOX broadband channel with EC Overpass
```

```{card}
:img-top: ../figures/HALO-20240813a/HALO-20240813-wales-ec.png
WALES (backscatter, polarization and humidity) at EC overpass
```

```{card}
:img-top: ../figures/HALO-20240813a/0813-wales-3d.png
WALES (3d backscatter)
```

```{card}
:img-top: ../figures/HALO-20240813a/0813-wales-x.png

WALES (cross section)
```

````