<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-01 -091 18:10:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.01 (091) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202609104011810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.498" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.848" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="200.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="200.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.991" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.170" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="390.578" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="292.659" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.805" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.074" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.822" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.703" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="171.230" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="170">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
200.000 200.000 205.000 210.000 215.000 220.000 225.000 230.000 232.500 235.000 240.000 245.000 250.000 250.000 253.333 256.667 260.000 263.333 266.667 270.000 275.000 277.500 280.000 282.500 285.000 285.000 290.000 295.000 300.000 300.000 302.500 305.000 310.000 310.000 315.000 320.000 322.500 325.000 325.000 330.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 341.667 343.333 345.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 395.000 396.250 397.500 398.750 400.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 447.500 450.000 450.000 452.500 455.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 465.000 465.000 465.000 467.500 470.000 470.000 472.500 475.000 480.000 481.250 482.500 483.750 485.000 490.000 492.500 495.000 497.500 500.000 502.500 505.000 500.000 500.000 505.000 510.000 510.000 516.875 523.750 530.625 537.500 544.375 551.250 558.125 565.000 565.000 575.000 580.000 593.333 606.667 620.000 635.088
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 0 0 0 57 0 54 0 48 48 0 48 48 0 48 0 51 0 51 48 0 0 0 57 45 54 57 54 48 0 51 57 0 54 60 0 54 60 60 60 0 0 0 60 0 0 0 0 51 57 0 57 60 63 66 63 63 69 69 66 0 63 60 60 0 60 54 54 54 54 60 57 54 57 60 63 60 66 57 0 0 0 57 60 60 66 54 60 66 57 63 66 63 60 63 54 60 66 57 57 60 63 66 63 0 66 63 66 66 63 66 66 0 69 66 63 63 0 60 60 0 57 0 54 51 0 51 54 48 0 0 54 0 57 54 0 51 45 0 0 0 48 45 0 42 0 0 0 48 48 0 0 51 42 0 0 0 0 0 48 0 42 48 54 54 57 0 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -2.734375 -2.734375 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 1.953125 2.734375 -1.171875 -0.390625 1.171875 -2.734375 2.734375 0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.547 90.0 95.0 100.0 105.0 110.0 113.256 115.0 116.512 119.768 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.578 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.011 2.589 2.894 2.991 2.869 2.869 2.869 2.991 2.997 3.123 3.254 3.391 3.532 3.677 3.824 3.973 4.125 4.278 4.432 4.588 4.744 4.902 5.061 5.221 5.383 5.546 5.71 5.875 6.043 6.212 6.383 6.555 6.73 6.908 7.087 7.269 7.454 7.641 7.832 8.025 8.221 8.421 8.624 8.83 9.039 9.252 9.468 9.686 9.908 10.131 10.357 10.583 10.808 11.031 11.25 11.461 11.662 11.847 12.011 12.149 12.255 12.323 12.35 12.35 12.346 12.33 12.305 12.269 12.224 12.169 12.107 12.036 11.958 11.873 11.782 11.684 11.581 11.473 11.36 11.242 11.121 10.996 10.867 10.736 10.602 10.466 10.328 10.188 10.047 9.905 9.761 9.617 9.473 9.328 9.183 9.038 8.893 8.749 8.605 8.461 8.319 8.177 8.036 7.897 7.758 7.621 7.485 7.35 7.217 7.085 6.955 6.826 6.699 6.573 6.449 6.327 6.206 6.088 5.971 5.855 5.742 5.63 5.52 5.412 5.305 5.2 5.097 4.996 4.896 4.798 4.702 4.608 4.515 4.424 4.334 4.246 4.16 4.075 3.992 3.91 3.83 3.752 3.675 3.599 3.525 3.452 3.381 3.311 3.243 3.175 3.109 3.045 2.982 2.919 2.859 2.799 2.741 2.683 2.627 2.572 2.519 2.466 2.414 2.364 2.314 2.265 2.218 2.171 2.126 2.081 2.037 1.994 1.952 1.911 1.871 1.831 1.793 1.755 1.718 1.682 1.646 1.611 1.577 1.544 1.511 1.479

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.991" PeakHeight="110.0" Num="3" Error="0.0">
-30.187 12.691 -2.957
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.991" EndFrequency="12.35" PeakHeight="390.578" Num="5" zHalfNm="292.659" Error="5.313">
-222.226 -63.491 16.641 -0.842 -0.892
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.768" Depth="0.122"/>
<TopsideChapman PeakHeight="390.578" PeakDensity="1892338.8" PeakScaleHeight="72.703" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
