<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 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: 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" >
2026.03.25 (084) 18:10:00</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">
FF202608403251810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.589" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.809" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="3.007" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.177" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="359.616" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.324" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.437" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="118.791" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.709" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.148" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 267.500 270.000 275.000 275.000 280.000 280.000 282.500 285.000 285.000 290.000 290.000 295.000 295.000 295.000 295.000 298.000 301.000 304.000 307.000 310.000 310.000 310.000 311.429 312.857 314.286 315.714 317.143 318.571 320.000 320.000 322.500 325.000 325.000 327.500 330.000 330.000 330.000 331.250 332.500 333.750 335.000 340.000 340.000 340.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 367.500 370.000 372.500 375.000 375.000 375.000 377.500 380.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 417.500 420.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 450.000 445.000 445.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 487.500 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 540.000 548.333 558.626 570.608
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 0 48 51 48 48 51 0 54 51 54 54 54 57 54 48 0 0 0 0 54 0 57 0 0 0 0 48 0 57 54 0 60 57 0 63 63 60 0 0 0 63 69 69 66 66 51 57 60 63 66 60 0 66 57 60 66 66 60 66 0 60 0 54 60 66 51 60 63 51 57 60 60 57 60 66 63 66 66 60 0 63 66 63 66 63 0 63 66 0 66 57 63 63 60 60 63 45 0 63 63 0 0 60 60 63 60 57 60 57 0 60 0 54 45 57 0 51 54 48 54 51 54 48 54 51 45 51 48 0 51 51 51 51 51 51 48 48 48 51 0 0 48
</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 -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 -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 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625
</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" >
89.544 90.0 95.0 100.0 105.0 110.0 113.186 115.0 116.373 119.559 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.616 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.021 2.603 2.909 3.007 2.885 2.885 2.885 3.007 3.022 3.186 3.341 3.493 3.643 3.793 3.943 4.095 4.25 4.406 4.566 4.728 4.893 5.062 5.234 5.41 5.588 5.77 5.956 6.145 6.336 6.531 6.729 6.929 7.132 7.338 7.546 7.756 7.969 8.184 8.4 8.619 8.84 9.062 9.286 9.511 9.738 9.965 10.193 10.42 10.646 10.868 11.085 11.293 11.485 11.653 11.787 11.873 11.9 11.9 11.892 11.871 11.838 11.794 11.738 11.672 11.597 11.512 11.42 11.319 11.212 11.098 10.978 10.853 10.722 10.588 10.45 10.308 10.163 10.016 9.866 9.715 9.562 9.408 9.253 9.097 8.942 8.786 8.63 8.474 8.319 8.165 8.012 7.86 7.708 7.559 7.41 7.263 7.118 6.974 6.832 6.692 6.554 6.418 6.283 6.151 6.021 5.892 5.766 5.642 5.52 5.4 5.282 5.167 5.053 4.941 4.832 4.725 4.619 4.516 4.415 4.316 4.218 4.123 4.03 3.938 3.849 3.761 3.675 3.591 3.509 3.428 3.35 3.273 3.197 3.123 3.051 2.981 2.912 2.844 2.778 2.714 2.65 2.589 2.528 2.47 2.412 2.356 2.301 2.247 2.194 2.143 2.093 2.044 1.996 1.949 1.903 1.858 1.815 1.772 1.73 1.69 1.65 1.611 1.573 1.536 1.5 1.465 1.43 1.396 1.364 1.331 1.3 1.269 1.239 1.21 1.181 1.154 1.126 1.1 1.074 1.048 1.024 0.999 0.976 0.953 0.93 0.908

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.007" PeakHeight="110.0" Num="3" Error="0.0">
-30.201 12.711 -2.966
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.007" EndFrequency="11.9" PeakHeight="359.616" Num="5" zHalfNm="270.324" Error="2.945">
-194.974 -60.085 17.024 -3.412 1.39
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.559" Depth="0.122"/>
<TopsideChapman PeakHeight="359.616" PeakDensity="1756947.9" PeakScaleHeight="65.148" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
