<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 19:10:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2o 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" >
2026.03.15 (074) 19:10:00</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">
FF202607403151910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.619" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.891" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.100" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" 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="34" Val="120.000" Name="h`Es" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="2.689" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="347.064" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="254.152" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.639" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.950" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.390" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.209" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.639" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="155.600" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 310.000 305.000 307.500 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 322.143 324.286 326.429 328.571 330.714 332.857 335.000 336.000 337.000 338.000 339.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 365.000 367.500 370.000 375.000 375.000 377.500 380.000 380.000 382.500 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 427.500 430.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 520.000 525.000 534.306 545.274 558.393
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 54 57 57 54 57 60 54 48 48 57 0 60 60 57 54 60 60 54 57 0 0 0 0 0 0 45 0 0 0 0 60 0 54 60 63 63 63 66 57 63 0 60 66 66 66 66 60 66 57 63 54 63 66 57 66 57 63 54 60 66 57 63 54 63 66 63 66 60 48 57 63 66 63 63 0 66 60 63 57 48 57 60 60 63 60 60 57 51 57 54 57 57 54 51 51 51 51 51 48 48 45 48 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -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 1.953125 2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
145.000 140.000 136.667 133.333 130.000 130.000 130.000 130.000 130.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 122.500 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.556 121.111 121.667 122.222 122.778 123.333 123.889 124.444 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 0 0 66 66 66 63 60 57 0 0 0 63 51 54 57 66 0 63 69 0 66 69 0 78 78 78 75 0 0 0 0 0 0 0 0 0 0 0 0 0 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
</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" >
89.602 90.0 95.0 100.0 105.0 110.0 114.659 115.0 119.317 120.0 123.976 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.064 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.233 1.806 2.328 2.602 2.689 2.566 2.566 2.566 2.584 2.689 2.735 2.938 3.121 3.296 3.469 3.64 3.812 3.986 4.162 4.34 4.52 4.702 4.887 5.073 5.261 5.45 5.64 5.831 6.023 6.215 6.407 6.6 6.793 6.985 7.178 7.371 7.563 7.756 7.949 8.142 8.334 8.527 8.72 8.913 9.106 9.298 9.488 9.677 9.862 10.042 10.212 10.367 10.498 10.595 10.645 10.65 10.648 10.636 10.612 10.579 10.536 10.484 10.423 10.354 10.277 10.194 10.105 10.009 9.908 9.802 9.691 9.577 9.459 9.337 9.213 9.086 8.957 8.826 8.694 8.56 8.425 8.29 8.154 8.017 7.881 7.744 7.608 7.473 7.338 7.203 7.07 6.937 6.806 6.676 6.547 6.419 6.293 6.168 6.044 5.923 5.803 5.684 5.568 5.453 5.339 5.228 5.118 5.01 4.904 4.8 4.697 4.597 4.498 4.4 4.305 4.212 4.12 4.03 3.941 3.855 3.77 3.686 3.605 3.525 3.446 3.37 3.294 3.221 3.149 3.078 3.009 2.941 2.875 2.81 2.747 2.684 2.624 2.564 2.506 2.449 2.393 2.339 2.286 2.234 2.183 2.133 2.084 2.037 1.99 1.944 1.9 1.856 1.814 1.772 1.732 1.692 1.653 1.615 1.578 1.542 1.506 1.472 1.438 1.405 1.372 1.341 1.31 1.28 1.25 1.221 1.193 1.165 1.139 1.112 1.087 1.062 1.037 1.013 0.99 0.967 0.944 0.923 0.901 0.88 0.86 0.84 0.821

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.689" PeakHeight="110.0" Num="3" Error="0.0">
-29.91 12.29 -2.778
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.689" EndFrequency="10.65" PeakHeight="347.064" Num="5" zHalfNm="254.152" Error="2.773">
-191.895 -48.966 21.623 -5.704 1.854
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="13.976" Depth="0.123"/>
<TopsideChapman PeakHeight="347.064" PeakDensity="1407227.0" PeakScaleHeight="66.639" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
