<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-13 -013 21:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.01.13 (013) 21:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.11" 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">
FF202601301132120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.663" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.427" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="0.943" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="368.094" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="295.402" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.413" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="104.714" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.000" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.393" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 275.000 275.000 275.000 275.000 276.429 277.857 279.286 280.714 282.143 283.571 285.000 285.833 286.667 287.500 288.333 289.167 290.000 290.000 291.000 292.000 293.000 294.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 316.000 317.000 318.000 319.000 320.000 321.667 323.333 325.000 325.000 326.250 327.500 328.750 330.000 330.000 332.000 334.000 336.000 338.000 340.000 340.000 345.000 346.250 347.500 348.750 350.000 350.000 355.000 356.667 358.333 360.000 360.000 360.000 361.667 363.333 365.000 365.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 380.000 382.500 385.000 387.500 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 460.000 465.000 470.000 475.000 475.000 480.000 490.000 490.000 496.479 503.936 512.610 522.828 535.040 549.894
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 60 66 0 66 66 0 0 0 0 0 0 60 0 0 0 54 0 63 69 0 0 0 0 0 63 75 75 0 66 0 0 60 0 66 0 54 57 63 63 0 0 0 66 0 0 0 48 66 0 0 0 0 0 0 54 72 0 0 60 0 51 78 75 69 0 0 0 63 66 57 0 0 54 60 63 54 0 63 66 54 57 54 60 0 66 66 57 63 63 0 66 0 60 66 69 69 66 66 63 69 66 66 57 66 69 63 66 60 66 63 66 63 66 66 63 66 69 69 72 72 69 66 63 60 69 66 54 63 60 60 54 51 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.336 95.0 100.0 105.0 110.0 115.0 120.0 125.0 128.416 130.0 135.0 140.0 145.0 146.833 150.0 155.0 160.0 165.0 165.249 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.094 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.628 0.817 0.913 0.943 0.927 0.878 0.791 0.703 0.703 0.703 0.703 0.703 0.703 0.744 0.809 0.875 0.94 0.943 1.067 1.189 1.312 1.441 1.579 1.728 1.89 2.067 2.26 2.469 2.695 2.935 3.187 3.449 3.718 3.991 4.268 4.545 4.823 5.1 5.376 5.65 5.923 6.195 6.464 6.731 6.996 7.258 7.517 7.771 8.02 8.261 8.494 8.715 8.921 9.107 9.268 9.397 9.49 9.541 9.55 9.549 9.535 9.506 9.463 9.407 9.339 9.259 9.17 9.071 8.964 8.85 8.729 8.602 8.47 8.333 8.192 8.048 7.902 7.753 7.603 7.452 7.299 7.147 6.994 6.842 6.69 6.539 6.389 6.24 6.093 5.948 5.804 5.662 5.522 5.385 5.249 5.116 4.986 4.857 4.731 4.608 4.487 4.369 4.253 4.139 4.028 3.92 3.814 3.711 3.61 3.511 3.415 3.321 3.23 3.141 3.054 2.969 2.886 2.806 2.727 2.651 2.577 2.504 2.434 2.365 2.299 2.234 2.171 2.109 2.049 1.991 1.935 1.88 1.826 1.774 1.724 1.675 1.627 1.58 1.535 1.491 1.449 1.407 1.367 1.328 1.29 1.253 1.217 1.182 1.148 1.115 1.083 1.052 1.022 0.993 0.964 0.936 0.909 0.883 0.858 0.833 0.809 0.786 0.763 0.741 0.72 0.699 0.679 0.66 0.641 0.622 0.604 0.587 0.57 0.554 0.538 0.522 0.507 0.492 0.478 0.465 0.451 0.438 0.426 0.413 0.401 0.39

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.943" PeakHeight="110.0" Num="3" Error="0.0">
-26.24 7.724 -1.148
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.943" EndFrequency="9.55" PeakHeight="368.094" Num="5" zHalfNm="295.402" Error="3.117">
-192.459 -17.557 10.839 -6.486 2.818
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="55.249" Depth="0.24"/>
<TopsideChapman PeakHeight="368.094" PeakDensity="1131544.6" PeakScaleHeight="53.393" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
