<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 15:40:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.16 (075) 15:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607503161540009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.690" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.819" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="455.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.396" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.363" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="341.946" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.411" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.533" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="114.188" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.624" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.733" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.230" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 300.000 305.000 302.500 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 371.667 373.333 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 400.000 400.714 401.429 402.143 402.857 403.571 404.286 405.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 428.750 432.500 436.250 440.000 445.000 447.500 450.000 455.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 496.568 504.065 512.705 522.770 534.645 548.866 566.204
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 48 0 48 60 57 54 54 57 0 54 54 54 57 57 57 57 57 60 60 63 60 60 57 66 66 66 63 63 63 63 66 66 63 66 66 66 66 63 57 69 69 63 63 63 54 0 63 66 66 63 63 66 0 54 0 60 60 60 60 60 60 63 0 63 66 66 63 60 0 0 63 63 60 0 54 60 63 63 60 57 57 60 60 48 48 54 60 45 51 51 57 0 57 54 0 45 0 0 0 0 45 0 48 48 48 48 48 51 45 0 0 0 48 42 0 45 42 0 48 51 51 54 54 54 54 54 48 45 0 0 48 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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 -1.171875 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 1.171875 -1.953125 -1.953125
</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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.527 113.054 114.581 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 341.946 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.285 2.939 3.285 3.396 3.273 3.273 3.396 3.416 3.625 3.805 3.972 4.132 4.287 4.44 4.593 4.745 4.899 5.054 5.211 5.371 5.534 5.7 5.87 6.044 6.223 6.406 6.595 6.788 6.988 7.193 7.405 7.622 7.847 8.077 8.314 8.557 8.806 9.061 9.32 9.583 9.849 10.116 10.383 10.646 10.903 11.15 11.384 11.598 11.787 11.947 12.072 12.156 12.197 12.2 12.197 12.182 12.154 12.113 12.06 11.997 11.923 11.84 11.748 11.647 11.539 11.424 11.303 11.175 11.043 10.906 10.764 10.619 10.471 10.32 10.166 10.011 9.853 9.695 9.535 9.375 9.214 9.053 8.892 8.732 8.572 8.413 8.254 8.097 7.94 7.786 7.632 7.48 7.33 7.181 7.034 6.889 6.746 6.605 6.466 6.329 6.195 6.062 5.931 5.803 5.677 5.553 5.431 5.311 5.194 5.078 4.965 4.854 4.745 4.639 4.534 4.432 4.331 4.233 4.136 4.042 3.949 3.859 3.77 3.683 3.599 3.515 3.434 3.355 3.277 3.201 3.126 3.054 2.982 2.913 2.845 2.778 2.713 2.65 2.588 2.527 2.468 2.41 2.353 2.298 2.243 2.191 2.139 2.088 2.039 1.991 1.944 1.898 1.853 1.809 1.767 1.725 1.684 1.644 1.605 1.567 1.53 1.494 1.458 1.424 1.39 1.357 1.325 1.293 1.262 1.232 1.203 1.175 1.147 1.119 1.093 1.067 1.041 1.017 0.992 0.969 0.946 0.923 0.901 0.88 0.859 0.838

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.396" PeakHeight="110.0" Num="3" Error="0.0">
-30.504 13.157 -3.17
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.396" EndFrequency="12.2" PeakHeight="341.946" Num="5" zHalfNm="256.411" Error="4.319">
-186.358 -51.27 6.818 2.775 0.67
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.581" Depth="0.123"/>
<TopsideChapman PeakHeight="341.946" PeakDensity="1846650.1" PeakScaleHeight="64.733" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
