<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-13 -044 12:40:00.000"
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: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.02.13 (044) 12:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604402131240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.377" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.578" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.141" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.243" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="383.447" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.701" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.068" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="186.077" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.973" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="102.381" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="221.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="106">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 215.000 220.000 225.000 230.000 235.000 235.000 240.000 245.000 250.000 255.000 258.750 262.500 266.250 270.000 275.000 278.000 281.000 284.000 287.000 290.000 293.750 297.500 301.250 305.000 310.000 310.000 313.333 316.667 320.000 323.333 326.667 330.000 330.000 335.000 335.000 337.500 340.000 342.500 345.000 347.500 350.000 355.000 360.000 360.000 362.500 365.000 367.500 370.000 372.500 375.000 377.500 380.000 382.500 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 440.000 445.000 455.000 455.000 460.000 465.000 470.000 480.000 490.000 495.000 500.000 505.000 510.000 510.000 515.000 515.000 525.000 525.000 530.000 535.000 535.000 545.000 550.000 550.000 555.000 560.000 570.000 575.000 583.202 592.994 604.889 619.645 638.436 663.179 697.233 747.074
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 48 0 45 54 45 0 48 48 0 0 0 48 45 0 0 0 0 54 0 0 0 57 54 54 0 51 0 54 0 63 57 60 60 0 51 0 0 0 57 54 48 51 0 51 0 0 0 0 0 51 0 48 54 57 57 0 51 57 0 51 60 60 57 48 51 51 57 60 60 54 63 63 60 60 57 45 51 51 54 48 63 60 63 63 63 60 57 57 57 54 60 60 63 60 54 54 60 57 57 57 54 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 -0.390625 -0.390625 0.390625 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 -2.734375 1.953125 -0.390625 0.390625 0.390625 1.953125 -0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 -2.734375 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 1.171875 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="10">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 110.000 107.500 105.000 105.000 100.000 100.000 100.000 100.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 57 54 0 54 0 48 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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" >
89.522 90.0 95.0 100.0 105.0 110.0 112.597 115.0 115.193 117.79 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.447 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.112 2.719 3.039 3.141 3.019 3.019 3.019 3.141 3.193 3.317 3.448 3.587 3.731 3.881 4.035 4.191 4.35 4.509 4.668 4.826 4.982 5.136 5.289 5.439 5.587 5.733 5.877 6.019 6.158 6.296 6.432 6.566 6.699 6.83 6.96 7.088 7.215 7.341 7.465 7.588 7.71 7.831 7.95 8.068 8.184 8.299 8.412 8.523 8.632 8.738 8.84 8.939 9.034 9.123 9.206 9.281 9.347 9.403 9.448 9.479 9.496 9.5 9.5 9.496 9.488 9.477 9.461 9.441 9.418 9.391 9.36 9.327 9.29 9.25 9.208 9.162 9.114 9.064 9.011 8.956 8.899 8.84 8.779 8.716 8.652 8.586 8.518 8.449 8.379 8.308 8.236 8.163 8.089 8.014 7.938 7.862 7.785 7.708 7.63 7.552 7.473 7.394 7.316 7.236 7.157 7.078 6.999 6.92 6.841 6.762 6.683 6.604 6.526 6.448 6.37 6.293 6.216 6.139 6.063 5.988 5.912 5.838 5.763 5.69 5.616 5.544 5.472 5.4 5.329 5.259 5.189 5.12 5.052 4.984 4.917 4.851 4.785 4.72 4.655 4.591 4.528 4.466 4.404 4.343 4.283 4.223 4.164 4.105 4.048 3.991 3.934 3.879 3.824 3.77 3.716 3.663 3.611 3.559 3.508 3.457 3.408 3.359 3.31 3.262 3.215 3.168 3.122 3.077 3.032 2.988 2.945 2.902 2.859 2.817 2.776 2.735 2.695 2.656 2.617 2.578 2.54 2.503 2.466 2.429 2.393 2.358

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.141" PeakHeight="110.0" Num="3" Error="0.0">
-30.311 12.872 -3.039
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.141" EndFrequency="9.5" PeakHeight="383.447" Num="5" zHalfNm="240.701" Error="3.865">
-246.828 -31.639 19.145 -6.915 0.58
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.79" Depth="0.122"/>
<TopsideChapman PeakHeight="383.447" PeakDensity="1119727.0" PeakScaleHeight="102.381" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
