BlueSky Altitude issue

[conjecture23]

Hi All,
In my BlueSky simulations, I am trying to get my aircraft to reach a certain altitude at a certain waypoint. However, BlueSky would only start to climb towards that altitude at that waypoint. Below is a sample of my script. Many thanks in advance.

00:00:00.00>TRAIL ON
00:00:00.00> CRE WCM6602 b788 2.8368 101.6767 347.0 2900.0    245.0
00:00:00.00> PAN WCM6602
00:00:01.00> ADDWPT WCM6602 2.8368     101.6767
00:00:01.00> WCM6602 AT WCM6602001 DO ALT WCM6602   2900.0
00:00:01.00> WCM6602 AT WCM6602001 DO SPD WCM6602   245.0
00:00:02.00> ADDWPT WCM6602 2.8653     101.6665
00:00:02.00> WCM6602 AT WCM6602002 DO ALT WCM6602   4225.0
00:00:02.00> WCM6602 AT WCM6602002 DO SPD WCM6602   247.0
00:00:03.00> ADDWPT WCM6602 2.8840     101.6604
00:00:03.00> WCM6602 AT WCM6602003 DO ALT WCM6602   5075.0
00:00:03.00> WCM6602 AT WCM6602003 DO SPD WCM6602   249.0
00:00:04.00> ADDWPT WCM6602 2.9022     101.6621
00:00:04.00> WCM6602 AT WCM6602004 DO ALT WCM6602   5875.0
00:00:04.00> WCM6602 AT WCM6602004 DO SPD WCM6602   254.0

[ProfHoekstra]

Yes, that is indeed what the ALT command does and is meant to do. When you use DO, you prepare a command to be executed when passing that waypoint. VNAV logic is: climb to the next altitude constraint as soon as you can, descend as late as possible. This creates automatically the ToC: Top of Climb and the ToD Top of Descent If you want VNAV logic, you should enter the altitude as part of the waypoint: ADDWPT WCM6602 2.8368     101.6767 2900 This will make the aircraft climb as soon as it is allowed by previous altitude constraints according to the Top of Climb logic: climb fast as soon as you can, as would happen in real FMS. If you want to climb gradually, switch off the TOC logic: WCM6602 TOC OFF For the descents the top-of-descent logic: descend fast and as late as possible. To make it descend gradually, switch of the Top of Descent logic: WCM6602 TOD OFF There are plans to add videos explaining the logic, but you can also find it on the wiki: https://github.com/TUDelft-CNS-ATM/bluesky/wiki/addwpt https://github.com/TUDelft-CNS-ATM/bluesky/wiki/Editing-flight-plans Best regards, Jacco Hoekstra From: conjecture23 ***@***.***> Sent: dinsdag 10 januari 2023 07:54 To: TUDelft-CNS-ATM/bluesky ***@***.***> Cc: Subscribed ***@***.***> Subject: [TUDelft-CNS-ATM/bluesky] BlueSky Altitude issue (Discussion #445) Hi All, In my BlueSky simulations, I am trying to get my aircraft to reach a certain altitude at a certain waypoint. However, BlueSky would only start to climb towards that altitude at that waypoint. Below is a sample of my script. Many thanks in advance. 00:00:00.00>TRAIL ON 00:00:00.00> CRE WCM6602 b788 2.8368 101.6767 347.0 2900.0    245.0 00:00:00.00> PAN WCM6602 00:00:01.00> ADDWPT WCM6602 2.8368     101.6767 00:00:01.00> WCM6602 AT WCM6602001 DO ALT WCM6602   2900.0 00:00:01.00> WCM6602 AT WCM6602001 DO SPD WCM6602   245.0 00:00:02.00> ADDWPT WCM6602 2.8653     101.6665 00:00:02.00> WCM6602 AT WCM6602002 DO ALT WCM6602   4225.0 00:00:02.00> WCM6602 AT WCM6602002 DO SPD WCM6602   247.0 00:00:03.00> ADDWPT WCM6602 2.8840     101.6604 00:00:03.00> WCM6602 AT WCM6602003 DO ALT WCM6602   5075.0 00:00:03.00> WCM6602 AT WCM6602003 DO SPD WCM6602   249.0 00:00:04.00> ADDWPT WCM6602 2.9022     101.6621 00:00:04.00> WCM6602 AT WCM6602004 DO ALT WCM6602   5875.0 00:00:04.00> WCM6602 AT WCM6602004 DO SPD WCM6602   254.0 — Reply to this email directly, view it on GitHub<https://urldefense.com/v3/__https:/github.com/TUDelft-CNS-ATM/bluesky/discussions/445__;!!PAKc-5URQlI!47Zt3WN-RsonMn4xuVmkBd5F-xGeolrVsXcdJaZE8o3tpWpwwYcXc3ayFVWqUrr3RpYltjhHluSMXNMA1mntSouW4eh_-g$>, or unsubscribe<https://urldefense.com/v3/__https:/github.com/notifications/unsubscribe-auth/ABWT2BABEIKPZKM2IDTTTILWRUBQHANCNFSM6AAAAAATWJTX4Y__;!!PAKc-5URQlI!47Zt3WN-RsonMn4xuVmkBd5F-xGeolrVsXcdJaZE8o3tpWpwwYcXc3ayFVWqUrr3RpYltjhHluSMXNMA1mntSotA04jrrg$>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.******@***.***>>

[conjecture23]

This was exactly what I wanted. Thank you, Prof Hoekstra!