<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-19 -050 15:00:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.02.19 (050) 15:00:00</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">
FF202605002191500009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.432" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.589" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="9.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="455.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="455.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" 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="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.395" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.362" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="355.142" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.929" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.492" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="155.759" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="43.635" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="86.106" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="210.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.050" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 460.000 465.000 470.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 525.000 525.000 525.000 525.000 530.000 535.000 540.000 545.000 545.000 550.000 555.000 560.000 566.667 573.333 580.000 585.000 594.341 605.349
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 66 69 69 66 63 66 66 69 66 60 51 51 60 45 45 54 54 54 0 54 51 45 51 54 51 48 0 0 45 45 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 -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 2.734375 -0.390625 0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="108">
<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 9.55 9.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 125.000 125.000 125.000 125.000 125.000 125.000 122.500 120.000 120.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000 116.000 117.000 118.000 119.000 120.000 120.000 115.000 115.714 116.429 117.143 117.857 118.571 119.286 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 54 54 51 0 48 48 51 0 51 0 0 0 0 0 48 54 0 0 0 0 57 57 45 0 0 0 0 63 63 60 0 0 0 0 0 0 63 63 63 63 60 60 60 0 0 0 0 0 0 0 0 72 72 69 72 72 72 72 72 72 72 72 72 72 69 69 69 0 0 0 0 0 0 0 0 0 0 0 0 69 69 69 69 69 69 69 66 66 66 66 66 63 63 60 0 0 0 54 0 0 51 51 48 48
</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 -0.390625 0.390625 -0.390625 0.390625 -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 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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.53 113.059 114.589 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.142 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.284 2.938 3.284 3.395 3.272 3.272 3.395 3.407 3.551 3.694 3.84 3.989 4.142 4.299 4.461 4.625 4.792 4.96 5.128 5.294 5.458 5.62 5.778 5.932 6.082 6.229 6.372 6.512 6.648 6.782 6.913 7.041 7.167 7.291 7.414 7.534 7.654 7.772 7.889 8.005 8.121 8.236 8.35 8.465 8.58 8.694 8.809 8.925 9.04 9.156 9.272 9.386 9.495 9.594 9.67 9.7 9.7 9.697 9.688 9.673 9.652 9.626 9.594 9.558 9.517 9.471 9.422 9.368 9.31 9.249 9.184 9.116 9.045 8.972 8.896 8.817 8.737 8.654 8.569 8.483 8.395 8.306 8.216 8.124 8.032 7.938 7.844 7.749 7.654 7.559 7.463 7.367 7.271 7.175 7.078 6.982 6.887 6.791 6.696 6.601 6.507 6.413 6.32 6.227 6.135 6.043 5.952 5.862 5.773 5.685 5.597 5.51 5.424 5.339 5.255 5.172 5.089 5.008 4.927 4.848 4.769 4.692 4.615 4.54 4.465 4.391 4.319 4.247 4.176 4.107 4.038 3.97 3.903 3.837 3.772 3.709 3.646 3.583 3.522 3.462 3.403 3.345 3.287 3.23 3.175 3.12 3.066 3.013 2.961 2.909 2.859 2.809 2.76 2.712 2.665 2.618 2.572 2.527 2.483 2.439 2.396 2.354 2.313 2.272 2.232 2.193 2.154 2.116 2.079 2.042 2.006 1.97 1.935 1.901 1.867 1.834 1.802 1.77 1.738 1.707 1.677 1.647 1.618 1.589 1.561 1.533

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.395" PeakHeight="110.0" Num="3" Error="0.0">
-30.503 13.156 -3.17
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.395" EndFrequency="9.7" PeakHeight="355.142" Num="5" zHalfNm="227.929" Error="3.335">
-203.684 -60.338 34.596 -14.098 2.971
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.589" Depth="0.123"/>
<TopsideChapman PeakHeight="355.142" PeakDensity="1167369.8" PeakScaleHeight="86.106" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
