Thread by @ESA_Webb

Taking #Webb's temperature 🌡️ 5 new temperature monitoring points have been added to the NASA website to track cooling and status of the instruments during the post L2 arrival commissioning process. Let's have a look at them 👇

1/ Temperature control is a vital aspect of #Webb 's design, engineering and operations. On the page you can see 2 "hot side" and 2 "cold side" temperatures and a set of bellweather instrument temperatures

2/ The instruments are located within the Integrated Science Instrument Module and the Fine Steering Mirror is located within the protrusion in the center of the primary mirror

3/ Each temperature sensor is located on the "bench" of the instrument which is the main structure that holds the instrument's optics & components. Numbers indicate
1⃣ MIRI Bench
2⃣ NIRCam Bench
3⃣ NIRSpec Bench
4⃣ FGS/NIRISS Bench
5⃣ FSM Fine Steering Mirror

4/ The temperatures displayed on the hot side of the observatory are located on the sunshield structure and spacecraft bus. The temperatures displayed on the cold side of the observatory are located on the primary mirror and instrument (ISIM) module radiator.

5/ Letters indicate
a) Sunshield UPS Average Temperature from 🔥 side Sunshield Structure
b) Spacecraft Equipment Panel Average Temperature from 🔥 side Spacecraft Bus
c) Primary Mirror Average Temperature from ❄️ side Mirrors
d) Instrument Radiator Temperature from ❄️ side ISIM

6. Temperatures are updated once per day and are rounded to the nearest whole number. You can switch between Fahrenheit and Celsius
Check them out: jwst.nasa.gov/content/webbLa…
#WebbSeesFarther