<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 21:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, 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" >
2026.04.03 (093) 21:50:00</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">
FF202609304032150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.174" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.395" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="400.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="400.000" 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="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="656.987" 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="0.367" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="529.044" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="444.873" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="125.378" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.887" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.904" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="164">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 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 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" >
400.000 400.000 400.000 400.000 405.000 405.667 406.333 407.000 407.667 408.333 409.000 409.667 410.333 411.000 411.667 412.333 413.000 413.667 414.333 415.000 415.000 415.000 415.000 415.000 415.000 420.000 421.250 422.500 423.750 425.000 425.000 425.000 426.250 427.500 428.750 430.000 430.000 431.250 432.500 433.750 435.000 437.500 440.000 442.500 445.000 445.714 446.429 447.143 447.857 448.571 449.286 450.000 445.000 450.000 455.000 455.000 455.000 455.000 457.500 460.000 462.500 465.000 460.000 462.500 465.000 465.000 467.500 470.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 480.000 481.786 483.571 485.357 487.143 488.929 490.714 492.500 494.286 496.071 497.857 499.643 501.429 503.214 505.000 505.000 505.000 505.000 505.000 510.000 510.000 510.000 515.000 515.000 520.000 520.000 520.000 520.000 522.500 525.000 530.000 530.000 535.000 535.000 535.000 535.000 537.500 540.000 545.000 545.000 550.000 550.000 550.000 555.000 555.000 555.000 560.000 565.000 565.000 565.000 570.000 570.000 575.000 575.000 575.000 580.000 585.000 585.000 590.000 590.000 595.000 595.000 595.000 597.500 600.000 607.500 615.000 620.000 620.000 625.000 625.000 630.000 635.000 637.500 640.000 642.500 645.000 648.624 652.601 656.987 661.847 667.262 673.335 680.192 687.995 696.956 707.352 719.557
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.228 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.815 140.0 145.0 150.0 155.0 160.0 165.0 169.629 170.0 175.0 180.0 185.0 190.0 195.0 199.444 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 529.044 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.243 0.318 0.355 0.367 0.363 0.352 0.333 0.303 0.261 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.23 0.258 0.286 0.314 0.342 0.367 0.375 0.434 0.487 0.539 0.591 0.643 0.698 0.755 0.815 0.877 0.943 1.012 1.085 1.162 1.244 1.329 1.42 1.516 1.616 1.722 1.833 1.95 2.072 2.2 2.333 2.472 2.617 2.767 2.923 3.084 3.251 3.423 3.6 3.782 3.97 4.162 4.359 4.561 4.768 4.979 5.194 5.413 5.637 5.864 6.094 6.328 6.565 6.805 7.046 7.289 7.534 7.778 8.022 8.264 8.503 8.738 8.966 9.186 9.395 9.59 9.768 9.926 10.06 10.167 10.244 10.289 10.3 10.3 10.291 10.271 10.239 10.196 10.144 10.082 10.011 9.933 9.847 9.754 9.654 9.549 9.439 9.324 9.205 9.082 8.956 8.826 8.695 8.561 8.426 8.289 8.151 8.012 7.872 7.733 7.593 7.453 7.314 7.175 7.037 6.9 6.764 6.629 6.495 6.362 6.231 6.101 5.973 5.847 5.722 5.599 5.478 5.359 5.242 5.126 5.013 4.901 4.792 4.684 4.578 4.474 4.372 4.272 4.175 4.078 3.984 3.892 3.802 3.713 3.627 3.542 3.459 3.377 3.298 3.22 3.144 3.069 2.996 2.925 2.855 2.787 2.721 2.656 2.592 2.53 2.469 2.41 2.352 2.295 2.24 2.186 2.133 2.082 2.032 1.982 1.934 1.888 1.842 1.797 1.754 1.711 1.669 1.629

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.367" PeakHeight="110.0" Num="3" Error="0.0">
-19.239 2.629 -0.162
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.367" EndFrequency="10.3" PeakHeight="529.044" Num="5" zHalfNm="444.873" Error="6.305">
-299.934 -48.252 20.322 -4.82 3.084
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="89.444" Depth="0.167"/>
<TopsideChapman PeakHeight="529.044" PeakDensity="1316253.1" PeakScaleHeight="62.904" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
