<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-05 -036 13:20:00.000"
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" >
2026.02.05 (036) 13:20:00</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">
FF202603602051320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.320" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.036" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.249" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.294" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="410.944" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.808" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.122" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="224.583" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.343" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="120.930" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="255.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="90">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 285.000 288.000 291.000 294.000 297.000 300.000 305.000 310.000 310.000 310.000 313.750 317.500 321.250 325.000 325.000 325.000 325.000 329.000 333.000 337.000 341.000 345.000 345.000 345.000 350.000 355.000 355.000 358.750 362.500 366.250 370.000 375.000 375.000 380.000 383.333 386.667 390.000 395.000 400.000 402.500 405.000 410.000 410.000 415.000 420.000 425.000 435.000 440.000 445.000 445.000 450.000 455.000 460.000 465.000 480.000 480.000 485.000 490.000 500.000 505.000 515.000 525.000 530.000 535.000 545.000 555.000 560.000 575.000 580.000 585.000 595.000 600.000 600.000 610.000 615.000 625.000 630.000 640.000 650.000 660.000 670.000 680.000 695.000 711.883 731.504 754.590 782.146 815.609
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 0 0 51 0 51 63 66 63 60 0 0 0 57 63 63 48 0 0 0 0 51 57 54 0 57 57 0 48 0 45 45 54 51 0 0 51 54 54 0 54 51 57 60 60 60 60 60 57 60 57 60 60 60 48 63 63 63 60 51 54 54 57 60 57 60 60 54 57 57 54 60 60 57 57 57 54 54 51 54 54 57 54 45 48 51 48 42
</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 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 -0.390625 -0.390625 -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" >
89.505 90.0 95.0 100.0 105.0 110.0 112.138 114.277 115.0 116.415 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 410.944 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.185 2.812 3.143 3.249 3.127 3.127 3.168 3.249 3.338 3.455 3.569 3.683 3.799 3.918 4.041 4.17 4.306 4.448 4.597 4.753 4.915 5.081 5.25 5.419 5.585 5.749 5.907 6.061 6.208 6.351 6.488 6.62 6.748 6.871 6.99 7.105 7.218 7.327 7.433 7.537 7.638 7.737 7.834 7.93 8.023 8.115 8.205 8.294 8.381 8.467 8.552 8.635 8.716 8.796 8.875 8.951 9.026 9.098 9.167 9.232 9.293 9.349 9.398 9.439 9.471 9.491 9.5 9.5 9.499 9.495 9.488 9.478 9.465 9.449 9.431 9.41 9.386 9.36 9.332 9.302 9.269 9.234 9.197 9.159 9.118 9.076 9.032 8.986 8.939 8.89 8.84 8.788 8.735 8.681 8.626 8.57 8.513 8.454 8.395 8.335 8.275 8.213 8.151 8.088 8.025 7.961 7.897 7.832 7.767 7.701 7.635 7.569 7.503 7.436 7.369 7.302 7.235 7.168 7.101 7.034 6.967 6.9 6.833 6.766 6.7 6.633 6.567 6.501 6.435 6.369 6.303 6.238 6.173 6.109 6.044 5.98 5.916 5.853 5.79 5.727 5.665 5.603 5.542 5.481 5.42 5.36 5.3 5.241 5.182 5.124 5.066 5.008 4.951 4.894 4.838 4.783 4.728 4.673 4.619 4.565 4.512 4.459 4.407 4.355 4.304 4.253 4.202 4.153 4.103 4.054 4.006 3.958 3.911 3.864 3.817 3.771 3.726 3.681 3.636 3.592 3.549 3.506 3.463 3.421 3.379 3.338

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.249" PeakHeight="110.0" Num="3" Error="0.0">
-30.396 12.997 -3.096
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.249" EndFrequency="9.5" PeakHeight="410.944" Num="5" zHalfNm="238.808" Error="5.795">
-279.257 -29.204 25.783 -17.304 5.453
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.415" Depth="0.122"/>
<TopsideChapman PeakHeight="410.944" PeakDensity="1119727.0" PeakScaleHeight="120.93" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
