<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-05 -064 13:00:00.000"
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="1 2 0 1 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.05 (064) 13:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606403051300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="36" >
<URSI ID="00" Val="10.275" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.423" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.794" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.639" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.650" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="97.802" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.938" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.712" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="446.579" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.228" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.400" 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="4.284" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="308.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="178.759" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.935" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.300" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="90.448" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="63.378" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="34.387" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.201" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.860" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.210" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.330" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="4">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 337.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 357.500 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 441.250 442.500 443.750 446.579 449.870 453.746 458.379 464.014 471.016 479.950 491.745
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 54 57 60 57 60 63 63 66 60 57 60 60 60 60 57 63 60 63 60 51 54 0 0 51 51 0 0 57 0 54 57 60 57 57 0 57 57 0 0 0 54 60 66 66 69 66 69 60 63 0 63 66 60 66 54 60 69 60 63 57 60 54 60 57 60 57 60 60 63 57 63 60 51 51 54 54 51 57 54 54 54 57 51 0 51 0 0 48 0 45 48 45 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 1.171875 -1.171875 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 -1.171875 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 215.000 220.000 221.667 223.333 225.000 225.000 230.000 237.500 245.000 250.500 256.000 261.500 267.000 272.500 278.000 283.500 289.000 294.500 300.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 45 0 0 51 48 54 0 51 0 48 0 0 0 0 0 45 0 51
</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 -2.734375 -0.390625 0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -2.734375 1.171875 1.953125 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
97.802 98.234 98.693 99.185 99.712 100.282 100.900 101.576 102.324 103.161 104.111 105.216 106.540 108.206 110.486 114.243
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 60 0 0 57 60 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 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 100.000 100.000 101.250 102.500 103.750 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 60 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 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 98.938 100.0 101.164 103.39 105.0 105.616 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.759 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 308.446 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.038 3.41 3.381 3.281 3.281 3.374 3.41 3.573 3.737 3.899 4.063 4.227 4.387 4.538 4.679 4.811 4.935 5.053 5.166 5.277 5.381 5.423 5.463 5.624 5.789 5.959 6.137 6.324 6.523 6.732 6.951 7.177 7.406 7.636 7.861 8.08 8.292 8.496 8.693 8.883 9.068 9.248 9.425 9.599 9.771 9.941 10.104 10.238 10.275 10.274 10.263 10.238 10.201 10.152 10.092 10.022 9.943 9.854 9.758 9.655 9.545 9.428 9.307 9.181 9.05 8.916 8.779 8.639 8.496 8.352 8.206 8.06 7.912 7.764 7.616 7.468 7.32 7.173 7.027 6.881 6.737 6.594 6.452 6.312 6.173 6.036 5.901 5.768 5.637 5.508 5.381 5.256 5.133 5.013 4.894 4.778 4.664 4.552 4.443 4.335 4.23 4.127 4.026 3.927 3.83 3.736 3.643 3.553 3.464 3.378 3.293 3.211 3.13 3.051 2.974 2.899 2.826 2.754 2.685 2.616 2.55 2.485 2.421 2.36 2.299 2.241 2.183 2.127 2.073 2.02 1.968 1.917 1.868 1.82 1.773 1.727 1.683 1.639 1.597 1.556 1.515 1.476 1.438 1.401 1.365 1.329 1.295 1.261 1.229 1.197 1.166 1.136 1.106 1.077 1.049 1.022 0.996 0.97 0.945 0.92 0.896 0.873 0.85 0.828 0.807 0.786 0.765 0.745 0.726 0.707 0.689 0.671 0.653 0.636 0.62 0.604 0.588 0.573 0.558 0.543 0.529 0.515 0.502 0.489 0.476 0.464 0.452 0.44

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.41" PeakHeight="98.938" Num="3" Error="0.916">
-13.292 5.738 -1.384
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.41" EndFrequency="5.423" PeakHeight="178.759" Num="5" Error="0.0">
-58.671 -20.435 8.08 -3.105 0.988
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.423" EndFrequency="10.275" PeakHeight="308.446" Num="5" zHalfNm="226.935" Error="2.046">
-99.588 -36.773 11.111 -5.986 1.549
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.678" Depth="0.129"/>
<TopsideChapman PeakHeight="308.446" PeakDensity="1309871.2" PeakScaleHeight="59.201" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
