<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 15:50:00.000"
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: 90% PACIFIC flags: One of F2 cusps was derived from the other</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" >
2026.03.22 (081) 15:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608103221550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.356" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.270" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="3.384" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.357" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="385.359" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="251.265" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.613" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="170.753" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.683" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.248" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="216.080" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.350" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 295.000 300.000 300.000 305.000 305.000 305.000 308.000 311.000 314.000 317.000 320.000 320.000 320.000 320.000 323.750 327.500 331.250 335.000 340.000 340.000 340.000 340.000 342.500 345.000 347.500 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 455.000 455.000 460.000 460.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 503.333 506.667 510.000 515.000 515.000 520.000 525.000 530.000 530.000 535.000 540.000 545.000 555.000 560.000 565.000 570.000 575.000 585.000 590.000 596.278 603.179 610.802 619.265 628.715 639.336 651.360 665.084 680.897
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 45 57 48 51 51 0 0 0 0 0 0 57 51 0 0 0 54 45 0 0 57 0 60 0 57 51 57 57 63 63 60 57 54 54 63 60 57 63 60 63 63 60 60 54 48 57 63 66 57 60 60 57 66 63 63 63 66 66 66 66 66 63 63 60 60 57 63 60 57 57 54 48 48 0 0 51 45 45 45 45 54 57 57 57 54 54 51 54 51 51 51 54 54 54 51 48 48 45 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 2.734375 0.390625 -0.390625 -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 2.734375 -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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.576 113.152 114.728 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.359 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.277 2.928 3.274 3.384 3.261 3.261 3.384 3.392 3.534 3.667 3.795 3.921 4.048 4.176 4.305 4.437 4.572 4.71 4.852 4.996 5.143 5.292 5.444 5.597 5.751 5.905 6.06 6.213 6.366 6.517 6.667 6.815 6.961 7.105 7.248 7.388 7.526 7.663 7.797 7.931 8.062 8.192 8.321 8.449 8.575 8.7 8.825 8.948 9.07 9.191 9.312 9.43 9.548 9.663 9.776 9.885 9.989 10.085 10.169 10.237 10.283 10.3 10.3 10.298 10.29 10.277 10.258 10.235 10.207 10.175 10.138 10.097 10.052 10.004 9.951 9.896 9.837 9.775 9.711 9.643 9.573 9.501 9.427 9.35 9.272 9.191 9.109 9.026 8.941 8.855 8.768 8.679 8.59 8.5 8.409 8.318 8.226 8.134 8.041 7.948 7.855 7.762 7.669 7.575 7.482 7.389 7.296 7.204 7.111 7.019 6.928 6.836 6.746 6.655 6.566 6.477 6.388 6.3 6.213 6.127 6.041 5.956 5.871 5.788 5.705 5.623 5.542 5.461 5.381 5.303 5.225 5.148 5.071 4.996 4.922 4.848 4.775 4.703 4.632 4.562 4.493 4.424 4.357 4.29 4.224 4.159 4.095 4.032 3.969 3.908 3.847 3.787 3.728 3.67 3.612 3.556 3.5 3.445 3.391 3.337 3.284 3.232 3.181 3.131 3.081 3.032 2.984 2.936 2.89 2.843 2.798 2.753 2.709 2.666 2.623 2.581 2.539 2.499 2.458 2.419 2.38 2.341 2.304 2.267 2.23 2.194

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.384" PeakHeight="110.0" Num="3" Error="0.0">
-30.496 13.144 -3.164
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.384" EndFrequency="10.3" PeakHeight="385.359" Num="5" zHalfNm="251.265" Error="4.862">
-232.922 -56.069 25.826 -11.073 3.607
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.728" Depth="0.123"/>
<TopsideChapman PeakHeight="385.359" PeakDensity="1316253.1" PeakScaleHeight="94.248" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
