Sandhyavandanam Grammar
This PDF has meanings from kamakoti: https://kamakoti.org/kamakoti/books/Essence-of-Gayatri.pdf

Theory: maybe chanting the mantras (apah punantu...) purifies you but also changes you to avoid bad foods and gifts etc. that would solve the strange "instant purification" hack.

Timings: Daytime, we have seen, is divided into eight parts. But it can also be divided into five, each of six nadikas. If the sun rises at 6, 6 to 8. 24 is morning or "pratah-kala"; 8. 24 to 10. 48 is "sangava-kala"; and 10. 48 to 1. 12 is "madhyahnika". From 1. 12 to 3. 36 it is "aparahna"; and from 3. 36 to 6 (or sunset) is "sayam-kala". (The time close to sunset is "pradosa". "Dosa" means night, the prefix "pra" meaning "pre" or "before". The English "pre' is derived from "pra". Pradosa thus is the time before night).

(Praah-sandhya is best performed in the presence of Stars on the Sky; when Stars are invisible then the time of Sandhya is of medium type but when Suryodaya has taken place then the Sandhyopaasna is of minimal value. Conversely, the Saayam Sandhya is best done while Surya is still present, after Sunset the Sandhya is of medium worth but when Stars appear on the Sky the Sandhya worship is of poor quality.

Like Christ, Savitri is a solar-being.

Questions

Doubts on Japam

instructions: https://www.prapatti.com/slokas/english/sandhyaavandanam.pdf
This source has a different varenyam for pranayama (vare-enyam) and japa (va-re-ni-yam)
GRD Iyers says va-re-en-yam for both..

does double swaras make two syllables in sanskrit meter?

Abhivadaye

Best done at sunrise, when you can see the colors, outside.
BG 17.11: Sacrifice that is performed according to scriptural injunctions without expectation of rewards, with the firm conviction of the mind that it is a matter of duty, is of the nature of goodness.

translation with meaning: https://www.tamilbrahmins.com/attachments/yajurveda-sandhyavandanam-pdf.460/

Nyasa - see 16 minutes: https://www.youtube.com/watch?v=3HY8ETZ__OI&t=4s
Need to charge body with devatas so the gayatri can get stored in your body

"Due to the medicine of chanting the names Achyuta, Ananta, Govinda all diseases crumble and vanish"

"> Without having realized God one cannot give up rituals altogether. How long should one practise the sandhya and other forms of ritualistic worship? As long as one does not shed tears of joy at the name of God and feel a thrill in one's body. You will know that your ritualistic worship has come to an end when your eyes become filled with tears as you repeat 'Om Rama'. Then you do not have to continue your sandhya or other rituals. When the fruit appears the blossom drops off." - Sri Ramakrishna

Prokshanam

Salutations to Lord Kesava. It is well known that you Gods of water are the source of greatness in life. Please grant us the ethereal vision. Like the holy and dear mothers, grant us please the ultimate essence of happiness that you have. We are praying you for that essence of happiness to posses, which you are personification of pleasure. You gods of water should through knowledge help us to be born holy in the next birth.

Prasanam

suryashcha = sun and
ma = I, (obj case of aham), same as maam
manyuhu = anger
manyushcha = anger and
manyu-pathaya-scha = anger-lord-and
manyu-kritebhyaha = anger-from (suffix bhyaha) those that were done (krite) (kru means to do)
papebhyaha - from (bhyaha) all the sins (pape)
rakshantam - may protect

yed-ratriya - which-night
paapam-akasam - sins-committed
manasam - by mind
vaacha - by word
hasta-bhyam - bhyam is dual, by two hands
pad-bhyam - by two legs
udareana - by stomach (udaram)
shishna - by penis (shishna)
ratrihi - night
avalambathu - may destroy
yetkinche - whatever
duritam - sin
mayi - inside me
idam-aham - this-i
maam - myself
amritam-yonau - the source of amrita
surye-jyotishi- in the sun's light
jehome-swaha - i sacrifice

Let the sun God, the anger that makes every one its slave and the powers of God, which control anger save me from the sins committed while being angry. Let the God of night remove the sins done by me using my mind, my voice, my hands, my legs, my belly and my penis and also any other sins that remain with me. I offer myself to the great light of sun, after the purifications of my sins as a result of this prayer. Let this offering be done well

Punaf Prokshanam

Library
IIM thoughts on sandhay vandanam, with an interview with MahaPeriyava: https://www.iimb.ac.in/webpages/files/Thoughts on Sandhya Vandanam v6 November 2015 a5 version.pdf
Ahnika grantha of Srimad Azhagiya singar - http://www.sriahobilamuttmysore.in/pdf/Ahnika-grantham (English) -26th pattam.pdf
Swami Parthamananda talk - https://www.pravachanam.com/albumfilesbrowselist/120/19

i like this pronunciation: https://www.youtube.com/watch?v=juXS1NvQdgo

GRD Iyer class: https://www.youtube.com/watch?v=nGJ9pzCngIg&list=PLUl6COS1NT_PreYbsgT3_p-KAd0TAfwmu&index=6 - has emotion in the pronunciations

instructions: https://www.prapatti.com/slokas/english/sandhyaavandanam.pdf