<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-26 -026 17:20:00.000"
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 11 0 0 0 0 0 0 0 0 1 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" >
2026.01.26 (026) 17:20:00</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">
FF202602601261720009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.318" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.342" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="596.978" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.184" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.263" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="399.306" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.890" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.111" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="160.028" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.171" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="88.476" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="216.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.4 10.45 10.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 345.000 347.500 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 380.000 380.000 380.000 385.000 390.000 395.000 395.000 400.000 405.000 410.000 410.000 415.000 420.000 422.500 425.000 425.000 425.000 430.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 455.000 465.000 465.000 465.000 468.750 472.500 476.250 480.000 485.000 490.000 490.000 495.000 500.000 500.000 510.000 510.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 545.000 545.000 555.000 555.000 560.000 560.000 560.000 565.000 570.000 570.000 575.000 580.000 580.000 585.000 588.574 592.544 596.978 601.964 607.612 614.062 621.499 630.167 640.401 652.666 667.634
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 54 0 48 54 54 0 0 0 57 57 57 48 54 60 63 60 63 57 63 60 66 66 63 66 69 66 60 66 72 75 0 66 66 66 63 0 57 60 57 63 57 66 63 63 60 57 63 63 0 60 0 63 60 57 60 60 60 60 48 60 60 57 60 60 60 57 57 57 57 54 57 42 51 45 51 57 57 48 54 0 45 51 48 48 48 45 45 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 2.734375 -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 -1.953125 2.734375 2.734375 -0.390625 -0.390625 0.390625 -1.953125 2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 0 54 48 54 0 54 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -1.171875 -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" >
89.515 90.0 95.0 100.0 105.0 110.0 112.414 114.827 115.0 117.241 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 399.306 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.141 2.756 3.08 3.184 3.062 3.062 3.071 3.184 3.283 3.44 3.585 3.722 3.855 3.986 4.116 4.247 4.377 4.508 4.64 4.773 4.907 5.041 5.176 5.312 5.449 5.585 5.722 5.859 5.996 6.133 6.27 6.406 6.542 6.678 6.813 6.947 7.081 7.215 7.348 7.481 7.613 7.745 7.876 8.007 8.138 8.269 8.4 8.531 8.662 8.793 8.924 9.056 9.187 9.319 9.452 9.584 9.716 9.848 9.977 10.104 10.224 10.333 10.423 10.483 10.5 10.5 10.496 10.485 10.469 10.447 10.419 10.386 10.347 10.304 10.257 10.204 10.148 10.088 10.024 9.957 9.886 9.812 9.735 9.656 9.574 9.49 9.403 9.315 9.225 9.133 9.04 8.945 8.85 8.753 8.655 8.556 8.457 8.357 8.257 8.156 8.055 7.954 7.852 7.751 7.65 7.549 7.448 7.347 7.247 7.147 7.048 6.949 6.85 6.753 6.655 6.559 6.463 6.368 6.274 6.18 6.088 5.996 5.905 5.815 5.726 5.638 5.551 5.465 5.379 5.295 5.212 5.129 5.048 4.968 4.888 4.81 4.733 4.657 4.581 4.507 4.434 4.361 4.29 4.22 4.15 4.082 4.015 3.948 3.883 3.819 3.755 3.692 3.631 3.57 3.51 3.451 3.393 3.336 3.28 3.225 3.17 3.117 3.064 3.012 2.961 2.911 2.861 2.812 2.764 2.717 2.671 2.625 2.58 2.536 2.493 2.45 2.408 2.367 2.326 2.286 2.247 2.208 2.17 2.133 2.096 2.06

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.184" PeakHeight="110.0" Num="3" Error="0.0">
-30.345 12.922 -3.062
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.184" EndFrequency="10.5" PeakHeight="399.306" Num="5" zHalfNm="272.89" Error="3.786">
-234.514 -74.172 33.133 -9.522 3.01
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.241" Depth="0.122"/>
<TopsideChapman PeakHeight="399.306" PeakDensity="1367866.0" PeakScaleHeight="88.476" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
