<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 12:40:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.01.29 (029) 12:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901291240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.562" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.520" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.150" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.260" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.367" Name="h`E" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="502.350" 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="3.127" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.236" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="351.824" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.504" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.692" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.519" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.455" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="78.725" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="176.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 218.333 221.667 225.000 225.000 230.000 235.000 239.000 243.000 247.000 251.000 255.000 260.000 260.000 263.750 267.500 271.250 275.000 278.750 282.500 286.250 290.000 290.000 290.000 295.000 300.000 300.000 300.000 300.000 305.000 305.000 310.000 312.143 314.286 316.429 318.571 320.714 322.857 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 336.667 338.333 340.000 342.500 345.000 345.000 347.500 350.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 493.693 497.786 502.350 507.470 513.253 519.839 527.406 536.192 546.516 558.822 573.741 592.203 615.642
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 0 0 54 51 45 0 0 0 0 60 57 57 0 51 0 0 0 0 0 60 66 63 0 54 0 66 63 63 63 63 0 0 0 0 0 0 45 54 60 54 0 57 60 0 63 0 0 51 48 57 57 0 51 45 51 0 48 0 57 66 66 69 63 69 69 69 72 66 69 66 66 57 60 54 66 60 69 63 66 63 66 66 60 66 66 69 69 66 66 63 60 63 63 60 63 63 57 63 60 57 60 54 60 60 60 57 60 54 54 51 51 54 51 48 48 0 42 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 -2.734375 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 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 -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 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="3">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.15 3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.367 103.037 105.323
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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" >
89.503 90.0 95.0 100.0 105.0 110.0 112.658 115.0 115.317 117.975 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 351.824 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.193 2.821 3.154 3.26 3.133 3.133 3.133 3.26 3.317 3.457 3.599 3.743 3.889 4.039 4.191 4.347 4.506 4.667 4.831 4.998 5.166 5.336 5.507 5.679 5.852 6.026 6.199 6.372 6.545 6.718 6.89 7.062 7.233 7.404 7.573 7.742 7.911 8.078 8.245 8.411 8.576 8.739 8.902 9.063 9.221 9.377 9.53 9.677 9.819 9.951 10.072 10.177 10.261 10.32 10.348 10.35 10.348 10.339 10.323 10.299 10.268 10.23 10.187 10.137 10.081 10.021 9.955 9.885 9.81 9.731 9.649 9.563 9.473 9.381 9.286 9.188 9.089 8.987 8.883 8.778 8.671 8.563 8.454 8.344 8.233 8.122 8.011 7.899 7.786 7.674 7.562 7.45 7.338 7.227 7.116 7.005 6.895 6.786 6.678 6.57 6.463 6.357 6.252 6.148 6.045 5.943 5.842 5.742 5.643 5.545 5.449 5.354 5.26 5.167 5.076 4.985 4.896 4.808 4.722 4.637 4.553 4.47 4.388 4.308 4.229 4.151 4.075 3.999 3.925 3.852 3.78 3.71 3.64 3.572 3.505 3.439 3.374 3.311 3.248 3.187 3.126 3.067 3.008 2.951 2.895 2.84 2.785 2.732 2.68 2.628 2.578 2.529 2.48 2.432 2.385 2.339 2.294 2.25 2.207 2.164 2.122 2.081 2.041 2.001 1.962 1.924 1.887 1.85 1.814 1.779 1.745 1.711 1.677 1.645 1.613 1.581 1.55 1.52 1.491 1.461 1.433 1.405 1.378 1.351 1.324 1.298

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.26" PeakHeight="110.0" Num="3" Error="0.0">
-30.404 13.009 -3.102
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.26" EndFrequency="10.35" PeakHeight="351.824" Num="5" zHalfNm="242.504" Error="3.95">
-201.375 -44.583 16.227 -5.225 1.107
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.975" Depth="0.127"/>
<TopsideChapman PeakHeight="351.824" PeakDensity="1329063.2" PeakScaleHeight="78.725" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
