<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 20:40:00.000"
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="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" >
2026.01.26 (026) 20:40:00</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">
FF202602601262040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.258" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.114" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.500" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" 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="9.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="621.278" 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="1.789" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="426.946" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="307.087" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.748" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="165.062" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.449" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="85.828" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="187.740" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 367.500 370.000 375.000 375.000 375.000 380.000 385.000 390.000 390.000 395.000 397.500 400.000 400.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 426.667 428.333 430.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 535.000 542.500 550.000 555.000 555.000 565.000 570.000 570.000 575.000 575.000 580.000 585.000 590.000 595.000 600.000 605.000 610.000 615.000 621.278 628.179 635.802 644.265 653.715 664.336 676.360 690.084
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 0 0 66 69 69 66 0 66 60 63 57 0 54 63 0 51 57 51 60 54 54 54 0 0 60 54 60 66 60 57 57 63 0 54 54 54 57 51 51 0 57 60 45 60 54 0 57 57 0 63 57 57 54 54 57 66 66 60 63 54 57 57 69 48 63 63 60 57 60 60 57 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 100.000 100.000 100.000 101.000 102.000 103.000 104.000 105.000 105.000 104.000 103.000 102.000 101.000 100.000 100.000 100.000 105.000 105.000 105.000 110.000 108.333 106.667 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 106.000 107.000 108.000 109.000 110.000 110.000 105.000 105.000 105.000 102.500 100.000 100.000 101.667 103.333 105.000 106.667 108.333 110.000 110.000 109.286 108.571 107.857 107.143 106.429 105.714 105.000 105.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 51 51 69 0 0 0 0 66 66 0 0 0 0 60 54 57 72 69 72 69 0 0 69 0 0 72 72 0 66 0 0 69 0 0 0 0 69 69 78 0 75 0 57 60 57 0 0 0 0 63 66 0 0 0 0 0 0 72 72 72
</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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.825 90.0 95.0 100.0 105.0 110.0 115.0 119.419 120.0 125.0 128.838 130.0 135.0 138.257 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 426.946 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.215 1.198 1.549 1.731 1.789 1.751 1.652 1.652 1.652 1.652 1.669 1.742 1.789 1.832 1.95 2.063 2.176 2.291 2.408 2.529 2.655 2.784 2.919 3.058 3.202 3.35 3.501 3.656 3.812 3.971 4.13 4.289 4.448 4.606 4.764 4.92 5.075 5.229 5.381 5.532 5.682 5.83 5.977 6.122 6.267 6.41 6.552 6.694 6.834 6.974 7.113 7.251 7.388 7.525 7.661 7.796 7.93 8.063 8.195 8.326 8.455 8.581 8.703 8.822 8.934 9.039 9.134 9.216 9.281 9.326 9.348 9.35 9.349 9.342 9.33 9.311 9.288 9.259 9.226 9.187 9.145 9.098 9.047 8.992 8.934 8.873 8.808 8.74 8.67 8.597 8.522 8.445 8.365 8.284 8.201 8.116 8.031 7.943 7.855 7.766 7.676 7.585 7.494 7.402 7.31 7.217 7.124 7.031 6.938 6.845 6.752 6.66 6.567 6.475 6.383 6.292 6.201 6.111 6.021 5.932 5.843 5.755 5.668 5.581 5.496 5.411 5.327 5.243 5.161 5.079 4.999 4.919 4.84 4.762 4.685 4.609 4.534 4.46 4.386 4.314 4.243 4.172 4.103 4.034 3.967 3.9 3.834 3.77 3.706 3.643 3.581 3.52 3.46 3.401 3.343 3.285 3.229 3.173 3.118 3.064 3.011 2.959 2.908 2.857 2.807 2.758 2.71 2.663 2.616 2.57 2.525 2.481 2.437 2.395 2.352 2.311 2.27 2.23 2.191 2.152 2.114 2.076 2.04 2.004 1.968 1.933 1.899

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.789" PeakHeight="110.0" Num="3" Error="0.0">
-28.715 10.648 -2.108
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.789" EndFrequency="9.35" PeakHeight="426.946" Num="5" zHalfNm="307.087" Error="6.796">
-263.514 -43.968 27.555 -12.473 3.711
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.257" Depth="0.137"/>
<TopsideChapman PeakHeight="426.946" PeakDensity="1084646.4" PeakScaleHeight="85.828" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
