<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-02 -092 16:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.04.02 (092) 16:30:00</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">
FF202609204021630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.620" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.699" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="497.001" 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="3.312" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.324" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="358.904" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="273.746" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.507" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="109.005" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.103" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.119" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 330.000 332.500 335.000 335.000 337.500 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 362.500 365.000 370.000 370.000 370.000 375.000 375.000 377.500 380.000 385.000 385.000 385.000 387.500 390.000 390.000 392.500 395.000 400.000 400.000 400.000 400.000 405.000 405.000 407.500 410.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 450.000 448.333 446.667 445.000 450.000 450.000 450.000 450.000 450.000 455.000 455.000 455.000 455.000 455.000 460.000 461.667 463.333 465.000 466.667 468.333 470.000 470.000 470.000 475.000 475.000 477.500 480.000 480.000 482.500 485.000 485.000 486.498 488.154 489.995 492.054 494.372 497.001 500.008 503.482 507.540 512.341 518.114 525.183 534.041 545.468
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 51 0 51 51 54 0 51 51 0 0 54 57 57 51 60 57 57 60 57 57 57 57 57 51 57 57 54 57 54 0 48 57 0 57 60 51 57 63 54 60 60 60 45 51 57 60 0 60 51 57 63 57 60 51 60 48 54 60 54 60 63 57 63 54 57 60 63 60 60 54 63 51 57 60 63 57 48 0 57 63 63 57 63 63 60 60 57 63 57 57 60 0 57 57 57 45 0 0 54 57 0 54 57 51 57 0 57 0 54 54 0 0 0 0 0 51 0 51 51 51 45 54 54 0 51 48 54 51 51 45 51 0 48 51 54 42 0 0 51 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 -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 1.953125 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 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875
</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" >
89.495 90.0 95.0 100.0 105.0 110.0 111.872 113.744 115.0 115.616 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.904 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.228 2.866 3.204 3.312 3.189 3.189 3.272 3.312 3.449 3.6 3.75 3.898 4.045 4.193 4.341 4.49 4.641 4.792 4.945 5.1 5.257 5.415 5.575 5.736 5.9 6.066 6.233 6.403 6.574 6.748 6.924 7.101 7.281 7.463 7.647 7.834 8.023 8.215 8.409 8.606 8.805 9.008 9.214 9.424 9.637 9.854 10.075 10.3 10.53 10.764 11.001 11.241 11.48 11.711 11.916 12.06 12.1 12.1 12.088 12.063 12.023 11.97 11.904 11.827 11.74 11.642 11.536 11.421 11.298 11.169 11.033 10.892 10.746 10.595 10.441 10.283 10.122 9.959 9.794 9.628 9.46 9.292 9.123 8.954 8.785 8.616 8.448 8.281 8.115 7.951 7.787 7.625 7.465 7.307 7.15 6.996 6.843 6.693 6.545 6.399 6.255 6.114 5.975 5.839 5.705 5.573 5.444 5.317 5.193 5.071 4.952 4.835 4.72 4.608 4.498 4.39 4.285 4.182 4.081 3.982 3.886 3.791 3.699 3.609 3.521 3.435 3.35 3.268 3.188 3.11 3.033 2.958 2.885 2.814 2.744 2.676 2.61 2.545 2.482 2.42 2.36 2.301 2.244 2.188 2.133 2.08 2.028 1.977 1.928 1.88 1.833 1.787 1.742 1.698 1.656 1.614 1.574 1.534 1.496 1.458 1.422 1.386 1.351 1.317 1.284 1.252 1.22 1.19 1.16 1.131 1.102 1.074 1.047 1.021 0.995 0.97 0.946 0.922 0.899 0.876 0.854 0.833 0.812 0.791 0.771 0.752

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.312" PeakHeight="110.0" Num="3" Error="0.0">
-30.444 13.067 -3.128
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.312" EndFrequency="12.1" PeakHeight="358.904" Num="5" zHalfNm="273.746" Error="1.644">
-184.146 -79.43 23.294 -3.926 0.92
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.616" Depth="0.123"/>
<TopsideChapman PeakHeight="358.904" PeakDensity="1816501.2" PeakScaleHeight="61.119" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
