Flight Profiles
Safir IRILV

 Lift-off  Vehicle = 0 sec Omid Rasad Navid Fajr-3

Burnout first stage

  + 152    

Separation first stage

  + 152    

Coast phase

  + 152 ... + 194    

Jettison fairing

  + 194    

Ignition second stage

  + 215    

Burnout second stage

  + 460    

Separation spacecraft

  + 465    

 

video cut
0 + 97 + 152 sec  + 165 sec + 194 sec + 205 + 215 sec (?) + 465 sec
Ignition   Burnout + Sep. 1/2 in coast phase Sep. fairing in coast phase Ignition 2. stage Sep. payload

 

The Iranian Aerospace Organization (IAO) with the support of the ministry of defense and armed logistics:
"The latest video of Rasad satellite being launched in space, that was received by using the telemetry (sub)system, is published.
The video images were filmed using cameras that were attached to the body of the SLV and filmed the different stages of the launch, the separation of the first stage booster, the separation of the cone and the distance it has from earth.
The cameras were connected to the body of the rocket in the following configuration:
- Top-left camera, outside, connected to the second stage facing downward.
- Bottom-left camera, outside, connected to the second stage facing upward.
- Top-right camera, inside in the payload shroud.
- Bottom-right camera, inside, between stages two and one, and next to the second stage engine.

The first stage booster had a burn time of 152 seconds, as can be seen on camera 01.

After burn out of the first stage and coupled with the fact that the vehicle had reached an altitude of 70 km above ground, and had reached a velocity of 2400 m/s, the first stage was separated and the second stage booster started to operate (can be witnessed on cameras 1 and 3). On continuation of its path, after the second stage booster (small solid  rockets) has burned for 42 seconds, had reached an altitude of 120 km and a velocity of 2550 m/s, the payload shroud (the housing covering the satellite at the tip) was separated (this can be witnessed on cameras 1, 3 and 4).

After that was done, and the second stage booster has burned for a total of 313 seconds, the SLV has reached the correct velocity and altitude for injection of the satellite, an altitude of 260 km and a velocity of 7600 m/s, the satellite was injected into the orbit (can be witnessed on cameras 2 and 3)."

Estimation of the terminal velocity (dV)
[dV = Isp [Ns/kg] * ln (Mf/Me)]

 

1. -- Mf - first stage: Total mass of the launcher
        Me - first stage: Empty mass of the first stage +total mass of the second stage  +fairing +payload

2. -- Mf - second stage: Total mass of the second stage with payload
        Me - second stage: Empty mass of the second stage with payload


Omid


Rasad


Navid

Fajr

 

Safir-1 (Omid)

  vac Isp (sec)  =Ns/kg Mf (kg) Me (kg) Mf/Me ln Mf/Me Isp * ln (Mf/Me)
1st 272 2667 25,183 6,983 3.606

1.28272

3,421

               
2nd 279 2736

3,425

375

9.140

2.21264

6,054

           

dV Total*

9,475 [m/sec]

* dV (vacuum); without losses of about 15-20% of velocity
Therefore is the real dV nearby 7,817  m/sec for payload 27 kg

Safir-1A (Rasad)

  vac Isp (sec)  =Ns/kg Mf (kg) Me (kg) Mf/Me ln Mf/Me Isp * ln (Mf/Me)
1st 283 2775 25,248 7,048 3.582

1.27595

3,541

               
2nd 290 2844

3,490

440

7.924

2.06994

5,887

           

dV Total*

9,428 [m/sec]

* dV (vacuum); without losses of about 15-20% of velocity
Therefore is the real dV nearby  7,778  m/sec for payload 15 kg

Safir-1B (Navid)

  vac Isp (sec)  =Ns/kg Mf (kg) Me (kg) Mf/Me ln Mf/Me Isp * ln (Mf/Me)
1st 283 2775 25,164 6,964 3.614

1.28471

3,565

               
2nd 290 2844

3,497

446

7.831

2.05808

5,853

           

dV Total*

9,418 [m/sec]

* dV (vacuum); without losses of about 15-20% of velocity
Therefore is the real dV nearby  7,770  m/sec  for payload 50 kg

Safir-1B+ (Fajr)

  vac Isp (sec)  =Ns/kg Mf (kg) Me (kg) Mf/Me ln Mf/Me Isp * ln (Mf/Me)
1st 295 2893 25,261 7,061 3.578

1,27467

3,688

               
2nd 290 2844

3,503

453

7.732

2.04534

5,817

           

dV Total*

9,505 [m/sec]

* dV (vacuum); without losses of about 15-20% of velocity
Therefore is the real dV nearby  7,841  m/sec for payload 52 kg