<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-30 -030 20:00:00.000"
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 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.01.30 (030) 20:00:00</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">
FF202603001302000009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.339" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.971" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.000" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="96.972" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.244" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="12.133" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.301" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="408.232" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.212" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.016" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="180.098" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.228" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="94.990" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.640" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 252.500 255.000 255.000 257.500 260.000 262.500 265.000 267.500 270.000 270.000 270.000 270.000 270.000 272.500 275.000 277.500 280.000 280.000 281.667 283.333 285.000 287.500 290.000 291.667 293.333 295.000 296.667 298.333 300.000 305.000 310.000 310.000 310.000 311.667 313.333 315.000 317.500 320.000 320.000 322.500 325.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 350.000 351.250 352.500 353.750 355.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 380.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 450.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 480.000 480.000 485.000 490.000 495.000 495.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 545.000 550.000 555.000 560.000 565.000 569.286 573.571 580.171 587.544 595.836 605.230 615.962 628.339 642.770 659.813 680.249 705.203 736.357
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 54 57 57 60 60 54 57 57 60 57 60 60 0 54 54 0 0 0 0 0 0 60 0 0 60 0 0 0 63 63 0 0 63 0 63 0 63 0 0 0 0 66 63 66 63 0 0 63 0 66 0 0 0 69 63 54 66 66 0 0 54 0 0 0 63 57 63 0 63 66 66 66 66 51 60 66 66 66 57 66 57 63 0 60 60 66 60 69 66 60 66 63 60 66 66 66 66 66 63 66 66 66 66 66 66 66 63 63 66 66 63 66 66 63 66 66 63 66 63 66 63 63 60 60 57 60 0 60 57 57 0 0 0 0 0 51 48 51 51 48 48 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 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 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 2.734375 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
96.972 98.715 100.645 102.807 105.267 108.125 111.548 115.844 121.702
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 48 0 0 0 48
</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 1.953125 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" >
86.904 90.0 95.0 99.244 100.0 105.0 105.843 110.0 112.441 115.0 119.04 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 408.232 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.587 2.256 2.41 2.408 2.309 2.277 2.277 2.277 2.329 2.41 2.43 2.532 2.634 2.737 2.842 2.951 3.065 3.183 3.307 3.438 3.577 3.723 3.878 4.041 4.212 4.39 4.573 4.761 4.952 5.144 5.335 5.525 5.712 5.896 6.077 6.254 6.427 6.596 6.762 6.925 7.085 7.241 7.395 7.546 7.695 7.841 7.985 8.127 8.267 8.405 8.542 8.676 8.809 8.939 9.067 9.193 9.317 9.437 9.554 9.667 9.774 9.876 9.969 10.053 10.124 10.182 10.223 10.246 10.25 10.25 10.245 10.235 10.22 10.2 10.175 10.146 10.112 10.075 10.033 9.987 9.938 9.885 9.829 9.77 9.709 9.644 9.577 9.507 9.435 9.361 9.285 9.207 9.127 9.046 8.963 8.879 8.794 8.707 8.62 8.532 8.443 8.353 8.263 8.172 8.081 7.989 7.897 7.805 7.713 7.621 7.529 7.437 7.345 7.254 7.162 7.071 6.98 6.89 6.8 6.71 6.621 6.532 6.444 6.357 6.27 6.184 6.099 6.014 5.93 5.847 5.764 5.682 5.601 5.521 5.441 5.363 5.285 5.208 5.132 5.056 4.982 4.908 4.835 4.763 4.692 4.622 4.552 4.484 4.416 4.349 4.283 4.218 4.154 4.09 4.027 3.966 3.905 3.844 3.785 3.726 3.669 3.612 3.556 3.5 3.446 3.392 3.339 3.286 3.235 3.184 3.134 3.085 3.036 2.988 2.941 2.894 2.848 2.803 2.759 2.715 2.672 2.629 2.588 2.546 2.506 2.466 2.426 2.388

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.41" PeakHeight="99.244" Num="3" Error="1.703">
-17.964 7.199 -1.575
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.41" EndFrequency="10.25" PeakHeight="408.232" Num="5" zHalfNm="275.212" Error="4.584">
-264.622 -34.488 19.411 -13.85 4.357
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.796" Depth="0.133"/>
<TopsideChapman PeakHeight="408.232" PeakDensity="1303505.0" PeakScaleHeight="94.99" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
