<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 16:00:00.000"
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="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 F2x 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" >
2026.02.03 (034) 16:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603402031600009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.379" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.025" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.700" 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="3.351" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.342" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="385.163" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.499" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.746" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="163.759" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.959" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="92.695" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="218.090" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="82">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 385.000 386.111 387.222 388.333 389.444 390.556 391.667 392.778 393.889 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 405.000 406.250 407.500 408.750 410.000 410.000 410.000 415.000 416.667 418.333 420.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 465.000 475.000 475.000 480.000 480.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 525.000 525.000 530.000 535.000 540.000 550.000 550.000 555.000 560.000 565.000 570.000 580.000 585.000 590.000 600.000 608.899 619.062 630.778 644.434 660.554 679.871
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 45 0 0 0 0 0 48 0 0 45 0 48 48 0 48 48 0 48 45 0 0 0 48 48 45 48 0 0 51 48 51 54 48 51 54 54 48 57 57 57 51 57 51 57 54 54 57 54 54 54 57 57 54 54 51 51 51 48 48 42 48 48 48 51 45 51 51 51 51 51 51 51 48 51 48 48 45 45 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -2.734375 -2.734375 0.390625 0.390625 -2.734375 -1.171875 -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 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 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
</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" >
89.489 90.0 95.0 100.0 105.0 110.0 111.711 113.423 115.0 115.134 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 385.163 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.254 2.9 3.242 3.351 3.228 3.228 3.341 3.351 3.52 3.678 3.827 3.97 4.11 4.246 4.379 4.512 4.642 4.772 4.902 5.031 5.159 5.288 5.416 5.544 5.673 5.801 5.93 6.059 6.188 6.317 6.447 6.577 6.708 6.839 6.97 7.102 7.234 7.367 7.5 7.634 7.768 7.902 8.037 8.172 8.307 8.442 8.578 8.713 8.847 8.98 9.113 9.243 9.37 9.494 9.612 9.724 9.827 9.917 9.993 10.051 10.087 10.1 10.1 10.097 10.089 10.076 10.057 10.033 10.005 9.972 9.934 9.893 9.848 9.798 9.745 9.689 9.63 9.567 9.502 9.434 9.364 9.291 9.216 9.139 9.06 8.979 8.897 8.813 8.727 8.641 8.554 8.465 8.376 8.286 8.195 8.103 8.012 7.919 7.827 7.734 7.641 7.548 7.455 7.362 7.269 7.176 7.084 6.992 6.9 6.809 6.718 6.627 6.537 6.448 6.359 6.27 6.183 6.096 6.01 5.924 5.839 5.755 5.672 5.589 5.507 5.426 5.346 5.267 5.189 5.111 5.034 4.959 4.884 4.809 4.736 4.664 4.592 4.522 4.452 4.383 4.315 4.248 4.182 4.117 4.052 3.989 3.926 3.864 3.803 3.743 3.684 3.625 3.568 3.511 3.455 3.4 3.345 3.292 3.239 3.187 3.135 3.085 3.035 2.986 2.938 2.89 2.843 2.797 2.752 2.707 2.663 2.62 2.577 2.535 2.494 2.453 2.413 2.373 2.334 2.296 2.258 2.221 2.185 2.149 2.114 2.079

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.351" PeakHeight="110.0" Num="3" Error="0.0">
-30.473 13.11 -3.148
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.351" EndFrequency="10.1" PeakHeight="385.163" Num="5" zHalfNm="256.499" Error="4.814">
-232.825 -57.007 21.676 -2.499 0.626
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.134" Depth="0.123"/>
<TopsideChapman PeakHeight="385.163" PeakDensity="1265632.8" PeakScaleHeight="92.695" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
