AirFish

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Basecamp

The project management is through AirFish Basecamp

Lift of balloon

  1. The volume of a sphere is 4/3 * pi * r^3, where r is the radius of the balloon.
  2. One cubic foot of helium will lift about 28.2 grams, so multiply the volume of the balloon by 28.2.
  3. Divide by 448 -- the number of grams in a pound -- to determine the number of pounds it can lift.
 (4/3) * pi * (r^3) * 28.2 = lift in grams
 ((4/3) * pi * (r^3) * 28.2) / 448 = lift in pounds


S60 control

Send an SMS with S60

This stuf looks trivial. This could be a very viable downlink. http://wiki.forum.nokia.com/index.php/How_to_send_SMS

import messaging
messaging.sms_send('number', 'text')

pyspy

http://sourceforge.net/projects/pyspy http://www.symbian-freak.com/forum/viewtopic.php?t=15756

Pressure versus Altitude

<tbody> </tbody>
            Barometric 
Pressure vs. Altitude Table
           

Altitude Above Sea Level

           

Temperature

           

Barometer

           

Atmospheric Pressure

           

Feet

           

Miles

           

Meters

           

F

           

C

           

In. Hg.  Abs.

           

mm Hg. Abs.

           

PSI

           

Kg / sq. cm

           

kPa

-5000

 

-1526

77

25

35.58

903.7

17.48

1.229

120.5

-4500

 

-1373

75

24

35.00

889.0

17.19

1.209

118.5

-4000

 

-1220

73

23

34.42

874.3

16.9

1.188

116.5

-3500

 

-1068

71

22

33.84

859.5

16.62

1.169

114.6

-3000

 

-915

70

21

33.27

845.1

16.34

1.149

112.7

-2500

 

-763

68

20

32.70

830.6

16.06

1.129

110.7

-2000

 

-610

66

19

32.14

816.4

15.78

1.109

108.8

-1500

 

-458

64

18

31.58

802.1

15.51

1.091

106.9

-1000

 

-305

63

17

31.02

787.9

15.23

1.071

105.0

-500

 

-153

61

16

30.47

773.9

14.96

1.052

103.1

0

 

0

59

15

29.92

760.0

14.696

1.0333

101.33

500

 

153

57

14

29.38

746.3

14.43

1.015

99.49

1000

 

305

55

13

28.86

733.0

14.16

0.996

97.63

1500

 

458

54

12

28.33

719.6

13.91

0.978

95.91

2000

 

610

52

11

27.82

706.6

13.66

0.960

94.19

2500

 

763

50

10

27.32

693.9

13.41

0.943

92.46

3000

 

915

48

9

26.82

681.2

13.17

0.926

90.81

3500

 

1068

47

8

26.33

668.8

12.93

0.909

89.15

4000

 

1220

45

7

25.84

656.3

12.69

0.892

87.49

4500

 

1373

43

6

25.37

644.4

12.46

0.876

85.91

5000

0.95

1526

41

5

24.90

632.5

12.23

0.86

84.33

6000

1.1

1831

38

3

23.99

609.3

11.78

0.828

81.22

7000

1.3

2136

34

1

23.10

586.7

11.34

0.797

78.19

8000

1.5

2441

31

-1

22.23

564.6

10.91

0.767

75.22

           
           

9000

1.7

2746

27

-3

21.39

543.3

10.5

0.738

72.40

10,000

1.9

3050

23

-5

20.58

522.7

10.1

0.71

69.64

15,000

2.8

4577

6

-14

16.89

429.0

8.29

0.583

57.16

20,000

3.8

6102

-12

-24

13.76

349.5

6.76

0.475

46.61

25,000

4.7

7628

-30

-34

11.12

282.4

5.46

0.384

37.65

30,000

5.7

9153

-48

-44

8.903

226.1

4.37

0.307

30.13

35,000

6.6

10,679

-66

-54

7.06

179.3

3.47

0.244

23.93

40,000

7.6

12,204

-70

-57

5.558

141.2

2.73

0.192

18.82

45,000

8.5

13,730

-70

-57

4.375

111.1

2.15

0.151

14.82

50,000

9.5

15,255

-70

-57

3.444

87.5

1.69

0.119

11.65

55,000

10.4

16,781

-70

-57

2.712

68.9

1.33

0.0935

9.17

60,000

11.4

18,306

-70

-57

2.135

54.2

1.05

0.0738

7.24

70,000

13.3

21,357

-67

-55

1.325

33.7

0.651

0.651

4.49

80,000

15.2

24,408

-62

-52

0.8273

21.0

0.406

0.406

2.80

90,000

17.1

27,459

-57

-59

0.520

13.2

0.255

0.255

1.76

100,000

18.9

30,510

-51

-46

0.329

8.36

0.162

0.162

1.12