Is it ok to have your Top Of Descent inside a STAR?

I am doing a flight from Turkmenistan’s Askhabad Internatinoal Airport (UTAA) to New York’s John F Kennedy International Airport (KJFK). the SID is ok for UTAA but my SimBrief FPL has my TOD insidwe the ROBER2 STAR. The TOD is between the PVD Providence VOR and fix TRAIT. The chart, linked above says that from PVD to TRAIT that i should be at 3000 feet, but at that point I would only have started to descend, since I wil be sleeping, I turned off step climbing, my cruise alititude will be FL320. So, is it ok to start your descent in the middle of a STAR? Sorry if this is a bumb question.

Insace anyone needs my FPL, here it is:

Coded

UTAA/30R MAM30D MAMED B450 MARAL N50 LASKA B450 PENUK R704 BUTRI DCT
TE B231 UK R11 TU R58 NOTAR DCT TOGMI Z265 TIGBA Z277 ABADA DCT
6500N DCT 65N010W 65N020W 64N030W 63N040W 61N050W 59N060W DCT LAKES
N780A YBC J561 PQI J55 ENE ROBER2 KJFK/22R

Decoded (from FPL to IF)

UTAA MAMED 3906N/5640E SAPAR BIBIM MAHYM TABAB MARAL SITON LASKA PENUK DETIR TETMA LUGEP PIMEG GAMTU TUSUN ARNIS BUTRI 5209N/3816E 5334N/3703E ERUNA GULMA KONIK 5444N/3513E URIMI SATAL RUBAG KOLED 5551N/3256E OLMET ROMEL KUDIM GUBIT PIKAM ATBUR ORTOK NOTAR TOGMI OXOTI TIGBA ABADA 6500N 6500N/1000W 6500N/2000W 6400N/3000W 6300N/4000W 6100N/5000W 5900N/6000W LAKES YBC YYY PQI FRIAR ENE ASPEN PVD 4125N/7146W TRAIT PARCH CCC ROBER JFK CORVT KJFK

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The 3000ft altitude in that chart isn’t the altitude you should be at. It’s the MEA, which is the Minimum Enroute Altitude. It’s essentially the lowest an aircraft can be at that given leg of a STAR. In the case of your chart, you cannot go below 3000ft.

If you want to know the altitudes you should be at for a given waypoint, look for altitudes that contain a line above, below, or above and below the altitude number. I’ve taken an example from your chart below.

Image 1: Altitude at Waypoint ROBER

Screen Shot 2021-07-06 at 9.23.48 PM

This means that you should expect to cross ROBER at exactly 9000ft, as designated by the lines both above and below the altitude.

Hope this helps!

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I’ve descended after the start of a STAR. It all depends on where you’re flying to and the procedures at that airport. @ToasterStroodie gives much better words than I do though

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Thank you so much!

No worries! Happy to help. And just as an additional note, you should expect to be at FL240 at TRAIT. Just look for those altitudes with a line above, below, or above and below them as a way to guide you down your descent path.

  1. A line above the altitude means cross at or below that altitude.
  2. A line below the altitude means cross at or above that altitude.
  3. A line above and below means cross at that altitude.

Of course, ATC can change your altitudes as they deem necessary, so always prioritize those instructions over your chart. Happy flying!

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