<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 22:20:00.000"
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 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" >
2026.02.10 (041) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604102102220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.307" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.460" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="610.919" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="485.100" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="403.684" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.771" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.212" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.148" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.148" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="124.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.710" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="128">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 385.000 390.000 395.000 400.000 405.000 410.000 410.000 405.000 410.000 405.000 405.000 405.000 400.000 395.000 397.500 400.000 400.000 400.000 401.875 403.750 405.625 407.500 409.375 411.250 413.125 415.000 420.000 420.000 417.500 415.000 415.000 415.000 418.333 421.667 425.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 440.000 435.000 430.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 446.250 447.500 448.750 450.000 455.000 455.000 460.000 460.000 460.000 460.000 465.000 466.667 468.333 470.000 471.667 473.333 475.000 475.000 475.000 480.000 480.000 485.000 490.000 495.000 495.000 497.500 500.000 500.000 505.000 505.000 505.000 510.000 515.000 515.000 515.000 520.000 520.000 525.000 525.000 530.000 535.000 535.000 540.000 545.000 545.000 550.000 555.000 555.000 560.000 565.000 570.000 571.883 573.961 576.267 578.840 581.731 585.000 588.728 593.020 598.012 603.892 610.919 619.467 630.087 643.639 661.529 686.240
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 63 0 0 0 54 0 57 60 63 60 60 54 0 63 0 54 54 54 0 0 0 0 0 54 0 0 57 57 0 63 0 51 0 0 57 60 60 60 57 57 57 60 60 57 54 0 60 60 63 66 63 66 63 60 66 66 0 51 57 66 0 0 0 66 63 54 54 0 0 60 66 57 69 54 0 0 66 63 63 69 69 66 69 72 72 0 69 69 72 72 72 0 63 60 75 69 63 69 69 66 63 72 69 66 66 66 51 63 63 57 54 66 48 63 69 63 66 66 60 60 63 51 0 0 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 1.171875 0.390625 2.734375 -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 1.171875 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 -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 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.061 145.0 150.0 155.0 160.0 165.0 170.0 172.121 175.0 180.0 185.0 190.0 195.0 200.0 203.182 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 485.1 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.265 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.239 0.264 0.289 0.313 0.338 0.354 0.373 0.427 0.485 0.547 0.613 0.684 0.759 0.84 0.925 1.016 1.112 1.213 1.32 1.433 1.551 1.675 1.806 1.942 2.084 2.233 2.388 2.548 2.715 2.888 3.068 3.253 3.444 3.642 3.845 4.054 4.268 4.488 4.713 4.942 5.176 5.414 5.656 5.9 6.146 6.394 6.641 6.888 7.133 7.374 7.611 7.84 8.061 8.27 8.467 8.648 8.811 8.955 9.075 9.172 9.242 9.285 9.3 9.3 9.294 9.277 9.249 9.21 9.162 9.105 9.04 8.967 8.887 8.8 8.707 8.609 8.506 8.399 8.287 8.172 8.054 7.933 7.811 7.686 7.559 7.432 7.303 7.174 7.044 6.914 6.785 6.655 6.526 6.397 6.27 6.143 6.017 5.892 5.769 5.647 5.526 5.407 5.29 5.174 5.06 4.947 4.836 4.727 4.62 4.515 4.412 4.31 4.21 4.112 4.016 3.922 3.83 3.74 3.651 3.564 3.479 3.396 3.315 3.235 3.157 3.081 3.006 2.933 2.862 2.792 2.724 2.658 2.593 2.529 2.467 2.406 2.347 2.289 2.233 2.178 2.124 2.071 2.02 1.97 1.921 1.873 1.827 1.781 1.737 1.694 1.651 1.61 1.57 1.531 1.492 1.455 1.419 1.383 1.349 1.315 1.282 1.25 1.219 1.188 1.158 1.129 1.101

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.3" PeakHeight="485.1" Num="5" zHalfNm="403.684" Error="2.96">
-269.92 -23.043 13.069 -2.487 0.463
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.182" Depth="0.154"/>
<TopsideChapman PeakHeight="485.1" PeakDensity="1073076.9" PeakScaleHeight="61.148" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
